YakTrax Diamond Grip gives you easy-to-use, easy-to-maintain traction anywhere you need it. The case-hardened, "diamond beads" cleats feature hundreds of micro edges for 360-degree degrees of traction over ice, snow, mud and more. The flexible fit stays put in all conditions, thanks to a design that features a rubber sling capable of staying elastic in subzero temps. The self-cleaning design and durable construction ensure unmatched grip on all your footwear, season after season. Note: to ensure the best fit on uninsulated boots, add one size to your shoe size, while adding two sizes for oversized or insulated boots. Sizing: Medium is mens 6.5-9, womens 7.5-10. Large Men's 9.5-12.5, Women's 10.5 and up. XL: Men's 13 and up. 2XL: Men's 13 Oversized and up.