The Camp XLC Nanotech features the same lightweight materials and construction as the hyperlight XLC crampons with the addition of innovative Sandvik Nanoflex® steel reinforcements on the front points for increased durability, strength, and penetration on hard ice and snow. Automatic bindings offer the most secure fit for rigid boots with full toe and heel welts, including A/T and telemark boots. Sandvik Nanoflex® is an innovative patented steel alloy that is 70% stronger and 20% harder than normal steel which allows for a significant reduction in the amount of metal used, thereby decreasing weight while maintaining strength. Tese are the most sophisticated mountaineering crampons in the world and have sandvik Nanoflex® stainless steel reinforcements on the front points. Its 3-D pressed frame maximizes strength and performance and automatic bindings fit most technical mountaineering and telemark boots. The CC4U wear indicators on the side points show when it is time for replacement and dynamic anti-balling plates and carrying case included. Size: 36-47. The frame is made of 7075 Aluminum / Nanoflex®