The Salomon S-Lab Trail Gaiters Low are unique gaiters, high-performance gaiters designed to protect your running footwear from trail debris and keep it from entering you footbed. Durable stretch fabric hold snuggly to your shoe and ankle to not impeed your stride or get caught by trail debris. The fabric is higly breathable, so your feet stay wonÃ¢ÂÂt over heat. The unique, non-abrasive connexion system patented by Salomon keeps the gaiter in place. Easy on/off with hook and loop closures. Durable, reinforced under-strap keep the gaiter in place but would snag underfoot. Sizing : Small: US Men's 4.5 - 7.5 / Women's 6 Ã¢ÂÂ 9, Medium: US Men's 7.5 - 9.5 / Women's 9 Ã¢ÂÂ 11, Large: US Men's 9.5 - 12 / Women's 11 - 13.5. *Compatible with low-cut footwear (not three-quarter top or boots) with an outsole arch (recessed groove for the under-strap).