Warm knits, icelandic textures, and two color marles make up Muk Luks Sweater Weather Collection. The Caris has a 100% acrylic upper and a warm 100% polyester fleece lining. Decorative wooden MUK LUKS buttons can be found on the back and a 9 inch sock is attached to the top of this fashionable boot. Spot clean, no bleach, and lay flat to dry. Made in China. Material: polyester, rubber, acrylic.