Skip navigation

GET $40 OFF your next purchase when you apply and get approved for a Nordstrom credit card. Restrictions apply. Apply Now

Sign In

  • All Clearance
  • Clearance Under $25

  • New Markdowns

  • Women
  • Men
  • Kids
  • Shoes
  • Bags & Accessories
  • Women

  • Clothing
  • Shoes
  • Handbags
  • Accessories
  • Jewelry
  • Beauty
  • Men

  • Clothing
  • Shoes
  • Accessories
  • Kids

  • Girls' Clothing
  • Girls' Shoes
  • Boys' Clothing
  • Boys' Shoes
  • Baby
  • Bags & Accessories

  • Shoes

  • Designer

  • Home

  • Beauty

Shop Now
  • All New & Now
  • Father's Day Gifts

  • Summer Style Essentials

  • Graduation Gifts

  • New From Our Top Brands

  • Top 100 Deals

  • Just Landed from Nordstrom

  • Linen Shop

  • Vacation & Resort

  • Women

  • Clothing
  • Shoes
  • Handbags
  • Jewelry & Watches
  • Accessories
  • Men

  • Clothing
  • Shoes
  • Accessories
  • Kids

  • Girls
  • Boys
  • Baby
  • Home

  • Beauty

  • Trending

  • Women's Bold Color
  • Women's Preppy Style
  • Women's Ruffle & Lace Details
  • Men's Baggy Jeans
  • Men's Preppy Style
  • Jelly Shoes
  • Beaded Accessories
  • Soccer Style
  • Flash Events

  • New-In John Hardy Fine Jewelry
  • L'AGENCE Up to 60% Off
Father's Day Gifts
  • All Women
  • New Arrivals

  • Best Sellers

  • Summer Essentials

  • Trending: Bold Colors

  • Trending: Ruffle & Lace Details

  • Trending: Preppy Style

  • Linen Shop

  • Nordstrom Made

  • Clearance

  • Clothing

  • Activewear
  • Coats & Jackets
  • Dresses
  • Jeans & Denim
  • Jumpsuits & Rompers
  • Lingerie, Hosiery & Shapewear
  • Matching Sets
  • Pajamas & Loungewear
  • Pants & Leggings
  • Shorts
  • Skirts
  • Suits & Separates
  • Sweaters
  • Sweatshirts & Hoodies
  • Swimsuits & Cover-Ups
  • Tops
  • Plus-Size Clothing
  • Shoes

  • Athletic & Sneakers
  • Boots & Booties
  • Comfort
  • Flats
  • Heels
  • Loafers
  • Oxfords
  • Sandals
  • Slippers
  • Handbags

  • Sunglasses & Eyewear

  • Jewelry & Watches

  • Accessories

  • Beauty

  • Shop by Occasion

  • Concert & Festival
  • Graduation
  • Night Out
  • Vacation & Resort
  • Wear to Work
  • Wedding Guest
  • Designer

  • Contemporary

  • Young Adult

Shop Now
  • All Men
  • Father's Day Gifts

  • New Arrivals

  • Best Sellers

  • Linen Shop

  • Trending: Baggy Jeans

  • Trending: Preppy Style

  • Summer Essentials

  • Sunglasses Under $100

  • Golf Shop

  • Clearance

  • Clothing

  • Activewear
  • Blazers & Sport Coats
  • Coats & Jackets
  • Dress Shirts
  • Jeans & Denim
  • Joggers & Sweatpants
  • Lounge, Pajamas & Robes
  • Pants
  • Polo Shirts
  • Shirts
  • Shorts
  • Suits & Separates
  • Sweaters
  • Sweatshirts & Hoodies
  • Swimwear & Board Shorts
  • T-Shirts
  • Underwear & Socks
  • Shoes

  • Athletic & Sneakers
  • Boots
  • Comfort
  • Designer
  • Dress Shoes
  • Loafers & Slip-Ons
  • Oxfords & Derbys
  • Sandals & Flip-Flops
  • Slippers
  • Accessories

  • Bags & Backpacks
  • Belts & Suspenders
  • Hats
  • Sunglasses & Eyewear
  • Ties & Pocket Squares
  • Watches
  • Dresswear Shop

  • Contemporary

  • Designer

  • Young Adult

  • Big & Tall

  • Grooming & Cologne

  • Shop by Occasion

  • Concert & Festival Outfits
  • Vacation & Resort
Shop Vacation
  • All Kids
  • New Arrivals

  • Best Sellers

  • Swim Shop

  • Vacation & Resort

  • Kids' Matching Sets

  • Kids' Value Packs

  • Trending: Ruffles & Bows

  • Summer Essentials

  • Surf & Skate for Kids

  • Active Shop

  • Sneakers Under $25

  • Clearance

  • Girls' Clothing

  • Toddler Girls (Sizes 2T-4T)
  • Little Girls (Sizes 4-6x)
  • Girls & Tweens (Sizes 7-20)
  • Girls' Accessories

  • Boys' Clothing

  • Toddler Boys (Sizes 2T-4T)
  • Boys (Sizes 4-7)
  • Boys (Sizes 8-20)
  • Boys' Accessories

  • Baby Apparel & Accessories

  • Baby Girl Clothing (0-24M)
  • Baby Boy Clothing (0-24M)
  • Unisex Baby Clothing (0-24M)
  • Baby Gear & Essentials
  • Baby Shower Gifts
  • Baby's First
  • Kids' Shoes

  • Baby & Walker Shoes
  • Toddler (Sizes 7.5-12)
  • Little Kid (Sizes 12.5-3)
  • Big Kid (Sizes 3.5-7)
  • Girls' Shoes
  • Boys' Shoes
  • Shop by Occasion

  • Special Occasion
  • Vacation & Resort
  • Toys

  • Disney & Character Shop

Kids' Sneakers
  • All Shoes
  • New Arrivals

  • Best Sellers

  • Party Shoes

  • Trending: Jelly Shoes

  • Trending: Western Boots

  • Sandals Under $50

  • Contemporary Brands

  • Designer Brands

  • Golf Shoes

  • Summer Essentials

  • Clearance

  • Women's Shoes

  • Athletic & Sneakers
  • Boots
  • Booties
  • Clogs
  • Comfort
  • Flats
  • Heels
  • Loafers
  • Mules
  • Oxfords
  • Sandals
  • Slippers
  • Extended Sizes & Widths
  • Men's Shoes

  • Athletic & Sneakers
  • Boots
  • Comfort
  • Designer
  • Dress Shoes
  • Loafers & Slip-Ons
  • Oxfords & Derbys
  • Sandals & Flip-Flops
  • Slippers
  • Extended Sizes & Widths
  • Kids' Shoes

  • Baby & Walker Shoes
  • Toddler (Sizes 7.5-12)
  • Little Kid (Sizes 12.5-3)
  • Big Kid (Sizes 3.5-7)
  • Girls' Shoes
  • Boys' Shoes
  • Athletic & Sneakers
  • Boots
  • Dress
  • Sandals
  • Kids' Shoes Size Chart

  • Shoe Care & Accessories

Shop Sandals
  • All Bags & Accessories
  • New Arrivals

  • Best Sellers

  • Trending: Beaded Accessories

  • Summer Accessories

  • Travel Must-Haves

  • Designer Sunglasses Under $200

  • Handbags Under $100

  • Watches Under $200

  • Clearance

  • Women's Accessories

  • Belts
  • Hats
  • Sarongs, Caftans & Cover-Ups
  • Scarves
  • Women's Handbags

  • Backpacks
  • Bag Charms
  • Clutches & Pouches
  • Crossbody Bags
  • Shoulder Bags
  • Tote Bags
  • Wallets
  • Women's Jewelry

  • Bracelets
  • Earrings
  • Jewelry & Watch Sets
  • Necklaces
  • Rings
  • Women's Fine Jewelry

  • Bracelets
  • Earrings
  • Necklaces
  • Rings
  • Under $150
  • Men's Accessories

  • Bags & Backpacks
  • Belts & Suspenders
  • Hats
  • Jewelry & Cufflinks
  • Wallets & Card Cases
  • Sunglasses & Eyewear

  • Watches

  • Luggage & Travel

  • Carry-On
  • Checked Luggage
  • Hardside Luggage
  • Softside Luggage
  • Designer

  • Designer Handbags
  • Designer Sunglasses & Eyewear
  • Designer Watches
  • Nordstrom Made

Shop Sunglasses
  • All Beauty
  • Father's Day Cologne & Grooming Gifts

  • New Arrivals

  • Best Sellers

  • Top Rated Beauty

  • Beauty Deals Up to 60% Off

  • Beauty Under $25

  • Summer Beauty Must-Haves

  • Clearance

  • Fragrance

  • Body Mist & Hair Mist
  • Candles & Diffusers
  • Cologne
  • Designer Fragrance
  • Fragrance Gift Sets
  • Perfume
  • Roller Ball & Travel Size
  • Makeup

  • Eyes
  • Face
  • Lips
  • Tools & Brushes
  • Bath & Body

  • Skin Care

  • Cleansers
  • Eye Creams & Treatments
  • Face Mists & Toners
  • Facial Masks
  • Moisturizers
  • Serums
  • Sunscreen
  • Tools & Devices
  • Hair Care

  • Hair & Scalp Treatments
  • Hair Accessories
  • Hair Dryers & Styling Tools
  • Hairstyling Products
  • Shampoo & Conditioner
  • Textured Hair Care
  • Gifts & Sets

  • Travel & Mini Sizes

  • Designer Beauty

  • Brushes, Tools & Devices

  • Men's Grooming & Cologne

  • Oral Care

  • Nails

  • Wellness & Self-Care

  • KBeauty

  • FSA/HSA Eligible Beauty

  • Top Brands

  • Anastasia Beverly Hills
  • Burberry
  • Calvin Klein
  • Charlotte Tilbury
  • Clinique
  • Dolce & Gabbana
  • Gucci
  • Kitsch
  • L'Occitane
  • Le Monde Gourmand
  • MAC Cosmetics
  • Marc Jacobs
  • NEST New York
  • Too Faced
Fragrance
  • All Home
  • Father's Day Home Gifts

  • New Arrivals

  • Best Sellers

  • Outdoor Living

  • Home Decor Under $50

  • Home Refresh

  • Travel Must-Haves

  • Cozy Home Shop

  • Housewarming Gifts

  • Wedding & Engagement Gifts

  • Clearance

  • Bedding

  • Comforters & Sets
  • Duvet Covers & Inserts
  • Pillows
  • Quilts
  • Sheet Sets
  • Blankets & Throws

  • Bath

  • Bath Rugs & Mats
  • Bath Towels
  • Bathroom Decor
  • Shower Curtains
  • Home Decor

  • Candles & Diffusers
  • Decorative Accessories
  • Decorative & Throw Pillows
  • Faux Plants & Stands
  • Rugs & Doormats
  • Kitchen & Tabletop

  • Bar Accessories
  • Cookware & Bakeware
  • Cutlery & Kitchen Knives
  • Drinkware & Glassware
  • Meal Prep
  • Small Appliances
  • Luggage & Travel

  • Electronic & Tech Accessories

  • Water Bottles & Tumblers

  • Storage & Cleaning

  • Pet Accessories

  • Nordstrom Made

Shop Now
  • All Gifts
  • Top Rated Gifts

  • Graduation Gifts

  • Gift Cards

  • Father's Day Gifts

  • Top 100 Gifts
  • Golf & Active Gifts
  • Watches & Accessory Gifts
  • Cologne & Grooming Gifts
  • Tech, Lounge & Home Gifts
  • Gifts by Recipient

  • Gifts for Her
  • Gifts for Him
  • Gifts for Kids & Babies
  • Gifts for Teens
  • Gifts for the Home
  • Gifts for the One Who Has Everything
  • Gifts by Price

  • Gifts Under $25
  • Gifts Under $50
  • Gifts Under $100
  • Luxe & Designer
  • Gifts by Occasion

  • Baby Shower Gifts
  • Bridesmaid Gifts
  • Groomsmen Gifts
  • Housewarming Gifts
  • Wedding & Engagement Gifts
Father's Day Gifts
Main content
  1. Home
  2. Women
  3. Clothing
  4. Pants & Leggings
Barbour Maisy Wide Leg Cotton Knit Pants, Main, color, Dark Navy
Barbour Maisy Wide Leg Cotton Knit Pants, Alternate, color, Dark Navy
Barbour Maisy Wide Leg Cotton Knit Pants, Alternate, color, Dark Navy
Barbour Maisy Wide Leg Cotton Knit Pants, Alternate, color, Dark Navy
Barbour Maisy Wide Leg Cotton Knit Pants, Alternate, color, Dark Navy
Barbour Maisy Wide Leg Cotton Knit Pants, Alternate, color, Dark Navy

Maisy Wide Leg Cotton Knit Pants

Barbour

$84.97Current Price $84.97
(50% off)50% off.
$170.00Comparable value $170.00
Color: Dark Navy
The brand says this runs true to size.
Size
GET $40 OFF next purchase + 5% off every Rack purchase with a Nordstrom credit card. Terms apply. Apply Now

Similar items you might like

  • Barbour Abby Double Breasted Knit Jacket
    Barbour
    $84.97Current Price $84.97
    $170.00Comparable value $170.00
  • Barbour Jasmine Contrast Detail Cotton Cardigan
    New Markdown
    Barbour
    $63.72Current Price $63.72
    $170.00Comparable value $170.00
  • Barbour Maisie High Waist Wide Leg Jeans
    Barbour
    $69.97Current Price $69.97
    $140.00Comparable value $140.00
  • Barbour Lucy Pleated High Waist Cotton & Linen Pants
    Barbour
    $69.97Current Price $69.97
    $140.00Comparable value $140.00
See More

Details & care

Level up your laid-back look in wide-legged pants crafted in a textured cotton knit and traced with contrast trim at the waist.

  • Elastic waist
  • 100% cotton
  • Machine wash, dry flat
  • Made in Turkey
  • Item #10681660
Helpful info:

Size info

  • The brand says this runs true to size.

Shipping & returns

This item qualifies for free shipping on orders over $89. View Shipping & Returns Policy.

This item is returnable within 40 days by mail or to U.S. Nordstrom Rack and U.S. Nordstrom stores. All beauty items are only eligible for return in U.S. Nordstrom Rack or U.S. Nordstrom stores.

Gift options

Write a gift message at Checkout and we'll email it to the recipient when their item is delivered
Need help finding the perfect gift? We've got you covered.
Shop Gifts

Barbour

Storied British brand Barbour has been making classic waxed jackets by hand for over a century. In the years since Barbour's founding, this family business has expanded into technically advanced clothing designed for a full lifestyle while remaining true to the core values of "wit, grit and glamour" of its beautifully functional pieces.

Reviews

(2)
2.5 out of 5
Write a Review
Fit: Large

Customer photos

Add your photo & review

Share your photo to help other shoppers.

5 stars
0%
4 stars
0%
3 stars
50%
2 stars
50%
1 star
0%
Sort by Most Helpful
Size
Color
deee1
Verified purchase
Fit:

Small
True to size
Large
Color: DARK NAVY
May 22, 2026
disappointing
These pants are beautiful and the fabric and style are great but the waist is comical big. Unfortunately, they don’t have any smaller sizes available.
Was this helpful?
karyne
Verified purchase
Fit:

Small
True to size
Large
Color: DARK NAVY
Height: 5’6”
Weight: 141 lb.
Mar 9, 2026
beautiful pair of pants but large
The pans are beautiful very comfortable but as soon as you wear them they become bigger . Unfortunately I couldn’t find any smaller size.
Was this helpful?

Outfit Ideas For This Item

  • Style idea 1
    Eileen Fisher Princess Sleeve Linen Top
    Eileen Fisher
    Nordstrom Layered Snake Chain Necklace
    Nordstrom
    adidas Lifestyle Non-Fold Beanie
    adidas
    Barbour Maisy Wide Leg Cotton Knit Pants
    Barbour
    adidas Gazelle Bold Sneaker
    adidas
  • Style idea 2
    Theory Puff Sleeve Crepe Knit Polo
    Theory
    Faherty Seacoast Open Stitch Cotton Shirt
    Faherty
    Madewell Cutout Ribbed Cuff Bracelet
    Madewell
    Barbour Maisy Wide Leg Cotton Knit Pants
    Barbour
    Vince Camuto Ellah Ankle Strap Platform Sandal
    Vince Camuto
  • Style idea 3
    Scotch & Soda Denim Western Shirt
    Scotch & Soda
    BOSS 58mm Cat Eye Sunglasses
    BOSS
    Vince Camuto Metallic Paper Packable Baseball Cap
    Vince Camuto
    Barbour Maisy Wide Leg Cotton Knit Pants
    Barbour
    adidas Grand Court Lo Sneaker
    adidas
  • Style idea 4
    NIC+ZOE Texture Stripe Button Shoulder Top
    NIC+ZOE
    Vince Camuto Crystal Station Necklace
    Vince Camuto
    adidas Lifestyle Fuzzy Headband
    adidas
    Barbour Maisy Wide Leg Cotton Knit Pants
    Barbour
    Nike Pacific Low Top Sneaker
    Nike
  • Style idea 5
    Nordstrom Packable Floppy Hat
    Nordstrom
    Seasalt Cornwall Bright Wave Floral Organic Cotton Sweatshirt
    Seasalt Cornwall
    Barbour Maisy Wide Leg Cotton Knit Pants
    Barbour
    adidas Run 70s 2.0 Sneaker
    adidas
  • Style idea 6
    DVF Joan Embroidered Crop Top
    DVF
    Nordstrom Graduated Bezel Cubic Zirconia Y Necklace
    Nordstrom
    adidas SuperLite 3 Climacool Adjustable Baseball Cap
    adidas
    Barbour Maisy Wide Leg Cotton Knit Pants
    Barbour
    Nike Air Max Excee Sneaker
    Nike
  • Style idea 7
    Nordstrom V-Neck Pima Cotton T-Shirt
    Nordstrom
    BOSS Flelani Metallic Virgin Wool Blend Open Front Cardigan
    BOSS
    Vince Camuto Curb Chain Bracelet
    Vince Camuto
    Barbour Maisy Wide Leg Cotton Knit Pants
    Barbour
    Vince Camuto Elias Sandal
    Vince Camuto

Frequently Bought Together

  • Barbour Emberly Knit Tank
    Barbour
    $49.97Current Price $49.97
    (50% off)50% off.
    $100.00Comparable value $100.00
  • Barbour Emery Stripe Crop Cotton & Cashmere Sweater
    Barbour
    $66.97Current Price $66.97
    (48% off)48% off.
    $130.00Comparable value $130.00
    (1)
  • Barbour Abby Stripe Belted Cotton & Linen Shirtdress
    Barbour
    $89.97Current Price $89.97
    (48% off)48% off.
    $175.00Comparable value $175.00
    (1)
  • Barbour Bronya Stripe Cotton Blend Sweater
    New Markdown
    Barbour
    $49.99Current Price $49.99
    (61% off)61% off.
    $130.00Comparable value $130.00
    (1)
  • Barbour Sophia Houndstooth Check Merino Wool Miniskirt
    New
    Barbour
    $86.97Current Price $86.97
    (45% off)45% off.
    $160.00Comparable value $160.00
  • Halfdays Alessandra Insulated Water Resistant Ski Pants
    New
    Halfdays
    $115.97 – $131.97Current Price $115.97 to $131.97
    (Up to 57% off)Up to 57% off.
    $275.00Comparable value $275.00
    (24)
  • AG Stella Wide Leg Jeans
    New
    AG
    $109.97Current Price $109.97
    (53% off)53% off.
    $235.00Comparable value $235.00
  • Nike Sportswear Phoenix Fleece High-Waisted Oversized Sweatpants
    New
    Nike
    Add to Bag or Wish List to see price(25)
  • Eileen Fisher Organic Cotton Wide Leg Pants
    New
    Eileen Fisher
    $106.97Current Price $106.97
    (39% off)39% off.
    $178.00Comparable value $178.00
  • Tori Richard A New Leaf Maybelle Wide Leg Linen Blend Pants
    New
    Tori Richard
    $99.97Current Price $99.97
    (54% off)54% off.
    $218.00Comparable value $218.00
  • PAIGE Manhattan Jeans
    New
    PAIGE
    $99.97Current Price $99.97
    (62% off)62% off.
    $269.00Comparable value $269.00
  • AG Cherise Crop Wide Leg Jeans
    New
    AG
    $109.97Current Price $109.97
    (55% off)55% off.
    $245.00Comparable value $245.00
  • DL1961 Casie Pleated Mid Rise Wide Leg Jeans
    New
    DL1961
    $99.97Current Price $99.97
    (61% off)61% off.
    $259.00Comparable value $259.00
  • AG Prima Low Rise Crop Cigarette Jeans
    New
    AG
    $79.97Current Price $79.97
    (61% off)61% off.
    $210.00Comparable value $210.00
  • AG 'Prima' Corduroy Skinny Pants
    New
    AG
    $79.97Current Price $79.97
    (57% off)57% off.
    $188.00Comparable value $188.00
    (18)
  • JASON WU Printed Wide Leg Pants
    New
    JASON WU
    $34.97Current Price $34.97
    (60% off)60% off.
    $88.00Comparable value $88.00
  • rag & bone Flexi Wren High Waist Slim Jeans
    New
    rag & bone
    $106.97Current Price $106.97
    (60% off)60% off.
    $268.00Comparable value $268.00
  • Free People West Coast Relaxed Jeans (Humble
    New
    Free People
    $49.97 – $61.97Current Price $49.97 to $61.97
    (Up to 60% off)Up to 60% off.
    $128.00Comparable value $128.00
    (2)
  • Free People Cheers Plaid High Waist Pants
    New Markdown
    Free People
    $45.99 – $72.97Current Price $45.99 to $72.97
    (Up to 68% off select items)Up to 68% off select items.
    $148.00Comparable value $148.00
  • AG Saige High Waist Straight Leg Jeans
    New
    AG
    $94.97Current Price $94.97
    (52% off)52% off.
    $198.00Comparable value $198.00
    (3)
  • Good American Poplin Pull-On Pants
    New
    Good American
    $49.97Current Price $49.97
    (57% off)57% off.
    $118.00Comparable value $118.00
  • Free People Costa Straight Leg Harem Pants
    New
    Free People
    $80.97Current Price $80.97
    (45% off)45% off.
    $148.00Comparable value $148.00
  • TWP Harrison Stretch Wool Pants
    New
    TWP
    $199.97Current Price $199.97
    (66% off)66% off.
    $595.00Comparable value $595.00
  • AG Saige Wide Leg Jeans
    New
    AG
    $109.97Current Price $109.97
    (55% off)55% off.
    $245.00Comparable value $245.00
See More
Download the Nordstrom Rack app.Download the Nordstrom Rack app.

Download Our App

And save big with alerts on price drops, new arrivals and more. Plus, Nordy Club members can access new app-exclusive perks!
Download Our App
Get free shipping on most orders over $89.Get free shipping on most orders over $89.

Free Shipping on Most Orders over $89

Plus, 40-day returns: by mail or free to U.S. stores.
Learn More
Apply today: get $40 off your next purchase plus an extra five percent off for cardmembers. A hand holding a credit card.Apply today: get $40 off your next purchase plus an extra five percent off for cardmembers. A hand holding a credit card.

$40 Off Your Next Purchase

Just apply and get approved for a Nordstrom credit card. Plus, get 5% off every Rack purchase when you use your credit card. Terms apply.
Apply Now
Help support Operation Warm. Two little girls smiling and wearing colorful coats.Help support Operation Warm. Two little girls smiling and wearing colorful coats.

Help Rack Help Kids

Join us in supporting Operation Warm, a nonprofit giving brand-new shoes and coats to kids.
Learn More & Donate Now

Get Rack Emails

Get the good stuff—new arrivals from Nordstrom, new markdowns, private sales and more.
Learn More
A new Rack store.A new Rack store.

New Nordstrom Rack Stores

Is your neighborhood on the list?
Find Your New Rack

You're in!

Stay tuned for the latest updates on new arrivals, special offers and more - all delivered straight to your inbox.

Privacy Policy

Get Email Updates:

Customer Service

  • Order Status
  • Guest Returns
  • Shipping & Return Policy
  • Gift Cards
  • Product Recalls
  • FAQ
  • Contact Us

About Us

  • About Our Brand
  • The Nordy Club
  • Store Locator
  • All Brands
  • Careers
  • Get Email Updates
  • Nordy Podcast
  • Store Openings

Nordstrom Rack & the Community

  • Our Impact
  • People & Culture

Nordstrom Card

  • Apply for a Nordstrom Card
  • Pay My Bill
  • Manage My Nordstrom Card

Nordstrom, Inc.

  • Nordstrom
  • HauteLook
  • Investor Relations
  • Press Releases
  • Nordstrom Media Network
Download Our App
  • Privacy
  • Your Privacy Rights
  • Terms & Conditions
  • California Supply Chains Act
  • ©2026 Nordstrom Rack