As the heaviest-duty gaiter in the Outdoor Research line-up, the Expedition Crocodile Gaiter is the go-to choice for serious mountaineering expeditions and rugged terrain. The 3-layer Gore-Tex provides waterproof breathable protection in the harshest weather conditions while burly 1000D Cordura on the inner leg stands up to sharp crampons and wear from hard-shell boots. Plus, the large circumference is specifically designed to accommodate high-insulation pants and bulky mountaineering boots.