Perfect gift for any bird lover. With their thick fleecy lining on the inside and soft fleece on the outside, they will keep your feet at a cozy dreamlike state. They also have a non-skid print on the sole to prevent falls. It's said that it's easier to fall asleep if your feet are warm so it could aid in sleep comfort as well. Adult sizes: S/M (4-6) and L/XL (7-9) Soft and lightweight, they're perfect for staying home or packing for trips. Machine washable and safe for dryers.