Perfect gift for the birder in your life! 

Sizing: Small= Women's Shoe Size 5.5-9 & Men's Shoe Size 4-7.5; Large= Women's Shoe Size 9.5+ & Men's Shoe Size 8-14

100% combed organic cotton facing yarn with a polyester-spandex backing for stretch (approx. 80% organic cotton, 17% polyester, 3% spandex), Made in China