Merrell All Out Crush Tough Mudder Women's Trail Running Shoes Tough, Durable and Breathable. There are enough epic obstacles on a tough mudder course and your footwear shouldn't be one of them. This versatile trail running shoe is built to take a beating, get you across the finish line, and clean up for your next adventure. UPPER Lock your foot in place through the toughest obstacles with a mesh, TPU and synthetic upper. With drainage ports and abrasion-resistant TPU film, these trail shoes serve up lightweight protection and prevent puddles from occurring within the shoe. A protective toe cap is added to provide that bit of protection whilst attempting the bigger obstacles such as the hero walls. Breathable mesh lining and reflective detailing finish off this fantastic upper by providing not only ventilation but enhanced visibility. MIDSOLE Unifly integrated EVA footbed absorbs the shock impact from rocks and obstacles, while a trailprotect pad offers underfoot protection from rocks and sticks on the trail. OUTSOLE Featuring pinwheel lugs that offer 360-degree traction and release mud for an easy clean up these trial shoes will provide sufficient grip when needed most. With a 5mm lug height the all out crush trail shoe digs into the trail to enhance traction.