Our proprietary insole is what we’re known for. Molded to match the specific shape and construction of every pair we make, this purpose-designed technology delivers the kind of fit, feel and performance that’s unmatched in the industry. A proprietary rubberized EVA that adapts to varying terrain. This unique blend of dualdensity, lightweight cushioning system provides the wearer a high level of energy efficiency and a softer heel strike landing zone. Our proprietary Trail Tread outsoles feature more than just a rubber compound. Combining end-use driven design elements with specific rubber formulations, our Trail Tread outsoles are engineered to meet the variable demands of different environments and trail conditions. The Sawtooth X Low Waterproof is even more capable than our beloved original. It has a new outsole for superior traction and a new Adaptive Cushioning Technology midsole for an even smoother ride. But among all this new-ness it retains the same great fit and feel and our B-DRY waterproof technology, so you can be confident taking on the trail, puddle filled or otherwise.