O Fit Insole is molded to match the specific shape and construction of every pair of Oboz shoes, this purpose-designed technology delivers the kind of fit, feel and performance that’s unmatched in the industry. The Sawtooth Midsole is great for everyday, whether it’s on the AT or your local trail. Featuring a duel-density EVA midsole that provides cushioning and stability and a nylon shank that gives added support under foot. A thru-hiker cult favorite, the Sawtooth Outsole is built to be versatile, flexible and supportive. The map molded in the bottom of the outsole features the Sawtooth mountain range near Sun Valley, Idaho. Large mesh panels let feet breathe easy. Rubber Heel Counters help shoes maintain a snug, comfortable heel hold over time.