Salewa Men's Raven 2 GTX Boot; with its winning combination of hard-wearing durability and lightweight performance, the Raven 2 is the ultimate summer mountaineering boot for moving quickly in the high mountains. A mix of tough suede and abrasion-resistant mesh in the upper offers the optimal balance of durability and breathability. It's backed up by a Gore-Tex Performance Comfort membrane for reliable, breathable waterproofing when you're trudging through melting snow. The 3F System connects the lacing to wire that wraps around the back of your foot for a secure, friction-free fit, and the 3D Lacing System breaks up the lacing into three sections so you can customize and fine-tune the fit to your exact specifications. The innovative Flex Collar increases the ankle's rear range of motion for enhanced comfort and range of motion during descents. Salewa's stiffest insole offers the support you need for all-day climbs in rough, rocky environments. Interchangeable layers in the MFF+ footbed lets you customize it to accommodate different foot shapes and sizes. CleanSport NXT antimicrobial technology keeps odor at bay when you're going days or weeks without showering. Wrapping-fit sole construction on the Vibram WTC outsole sheds weight without compromising support, traction, or durability.Upper Material: 1.6mm suede leather, abrasion-resistant mesh, microfiber, 360-degree full rubber randWaterproofing: Gore-Tex Performance ComfortClosure: 3D lacing systemFootbed: nylon + 27% fiberglass, MFF+ insole (Multi Fit Footbed)Sole: Vibram WTC