Goose down has one of the highest heat capacities among fibers - it retains heat more than other fills. It provides a comfortable and easy sleeping environment due to its light and thin structure. Goose down is odorless and dust-mite free. The filling of this pillow is made from the jowl and back feathers of goose. As the rate of jowl feathers increase, the rate of softness, lightness and heat capacity also increases. Back feather, which is generally mixed with a certain rate of jowl feather, provides volume and elasticity to the products due to its structure.