Ultralight Wading Boot was another project designed with Yvonne Chouinard. He wanted a boot that was comfortable to hike distances in, drainable, sticky but would not collapse under water pressure when deep wading. This cuts off circulation to the feet and allows them to get cold. We came up with the idea of internal “ribs” made of TPU that will flex when walking but keep upper from collapsing inwards. This boot is as lighter than most hiking boots making walking into the backcountry with them easy. Most importantly, Yvon was pleased.