Designed to mimic the shape of the human foot, keeping it in the position it would be in without shoes. Lightly used mens size 11.5 Black Mesh and TPU upper 100% recycled laces Stretch collar for easy on and off 40% recycled mesh lining EVA foam insole with 100% recycled top sheet Merrell Barefoot 2 construction is designed to keep the foot in a natural position Vibram EcoDura is 30% recycled rubber Feel free to ask any questions J135365 Merrell Shoes Vapor Glove 5 Men's 11.5 Sneakers Black Minimalist Barefoot Outdoor Vibram Active Outdoor Hike Adventure Trail Running