The Yaktrax Ascent traction spikes for backcountry excursions provide aggressive traction on snow, Ice, glaciers, and other wintry terrain. Featuring 16 stainless steel Spikes on each foot, that range in length from 3/8-1/2 an inch, The cleats ensure secure footing on steeps and traverses. Six forward-facing toe spikes dig into slopes, while the 3-point heel piece reduces snow buildup while hiking. A durable stainless steel undercarriage, and heavy-duty rubber webbing are built to withstand rugged terrain, season after season. The Yaktrax Ascent traction spikes for backcountry excursions are ideal for hiking and snow travel, with a thick elastomer binding that stretches to fit over most men's and Women's shoes and boots. Available in four sizes: Medium (fits shoe sizes W4. 5-8/M3. 5-6, weighs 0. 84 pounds), Large (fits shoe sizes W8. 5-12/M6. 5-10, weighs 0. 91 pounds), X-large (fits shoe sizes W12. 5-15/M10. 5-13, weighs 0. 94 pounds), and XX-Large (fits shoe sizes W15+/M13. 5-16, weighs 1. 03 pounds). Includes carrying bag. Sold as a pair.