EcoSox diabetic crews are the perfect foot health solution for those suffering from diabetes, edema (swelling), or neuropathy (nerve pain) as well as for people who prefer a non-binding top. EcoSox non-binding tops are designed with a relaxed fit so not to bind or inhibit blood flow but to have just the right amount of tension to keep them on your leg. Made in USA. 73% bamboo viscose, 19% polyester, 4% nylon, 4% rubber/spandex. Medium Men's - 5 - 9 Women's 6 - 10.5 Large Men's - 9 - 12.5 Women's 10.5 - 14