Existing modelBuilt on a women's specific last developed by top female alpine guides, the Camp Four is the result of nearly two decades of research in Yosemite's legendary Camp Four campground. This rugged, light-weight hiker soars on multi-pitch aid routes and is the shoe of choice for athletes running up Yosemite Falls for a sunset slackline of Lost Arrow Spire. It is light enough for everyday wear, but extremely rugged, and a trail- smart alternative to heavy, clumsy leather hiking boots. The Camp 4 features Five Ten's proprietary molded-PU external heel cage to maximize heel support and stability, allowing you to move with the agility of a mountain goat. Soles are proprietary co-molded Stealth C4/S1.