Consider the Iguana a secret weapon for long, difficult routes. Lightweight and collapsible, you can hang these from the back of your harness or stash 'em in your climbing pack, no problem. The EVA midsole still gives you a plush ride on the descent. They use a zonal weave upper, with different construction zones for breathability and light weight support. Long routes in Red Rocks or descending into the Black? Consider the Iguana.