The PRO in Wigwam's Diabetic Strider Pro means professional grade. Patented moisture control keeps feet dry and blister free while and anatomically correct fit eliminates slippage and friction. The Wigwam Diabetic Strider Pro is a superior all around diabetic sock with an easy fit leg for people with circulation issues. Our most advanced healthmedical sock is endorsed by the American Podiatric Association to soothe tired, aching feet. X2O Acrylic contains Chitosan, a natural odor defense to keep feet fresh Stay put, easy fit leg and top construction Cushiony sole for extra comfort Seamless toe closure 45% Olefin, 30% X2O Acrylic, 25% Stretch Nylon F1198Thanks for supporting the All American Brand Wigwam.