YaktraxA(R) Icetrekkers Diamond Grip(TM) shoe chains provide aggressive traction for all winter walking conditions, from boilerplate ice to backcountry snow and everything in between. The patented diamond shaped beads of these winter shoe chains have hundreds of biting edges that grip in all directions. Made of case-hardened steel alloy and strung on steel aircraft grade cable, they are extremely durable and are ideal for those who frequently encounter transitional surfaces such as rock, gravel, dirt, and bare concrete. FEATURES Beads swivel independently, preventing buildup of snow and ice Natural rubber sling remains elastic and secure in sub-zero temperatures Durable on tough transitional surfaces such as concrete and gravel Easy on/ Easy off Comfortable for prolonged use SIZING: SMALL - W 5-7 / M 5-6 MEDIUM - W 7.5-10 / M 6.5-9 LARGE - W 10.5+ / M 9.5-12.5 X-LARGE - M 13-15 2X-LARGE - M 13-15 Oversized