The Orvis PRO Wading Boot was designed in an industry-first collaborative effort with Michelin. The outsole compound is designed specifically for fly fishing. The Michelin Outdoor Extreme outsole design is absolutely revolutionary providing 25% better abrasion resistance and 43% improvement in wet rubber traction above the competition. With Michelin tire geometry, this wading boot offers more stability with a wider footprint and higher ratio of surface contact. The lug pattern improves pressure distribution and reduces shock for all day comfort. The midsole on this wading boot is made with maximum shock absorbing phylon that improves "river feel" by compressing less than most standard EVA midsoles. Ideal for saltwater and freshwater fly fishing conditions, even if you fish five days of the week or more. A wade in the river like a pro with the Orvis Pro Wading Boot.