These mittens are absolutely fabulous! The buffalo down yarn makes a durable, super warm and extremely soft fiber. Our de-haired bison down yarn is used to knit wonderfully light, believably durable, washable, wear-it-everywhere mittens. The American bison down traps your body heat within the air pockets next to your skin. Buffalo Gold yarn spun with 90% bison down/10% color matched nylon. Machine washable. 2 sizes - medium for women, large for men. Proudly harvested, spun and knit by your neighbors in the USA.