The upper material is 100% polyester microfiber. The intermediate layer is a breathable and waterproof PFC-free membrane. The lining is recycled polyester (air mesh). 3mm Bloom Foam insole. The sole is made of non-slip rubber Dimensions of the minimalist: Size Internal measurement Width 21 13.4 6 22 14.4 6.2 23 14.9 6.3 24 15.5 6.4 25 16 6.6 26 16.8 6.7 27 17.5 6.7 28 18 6.8 29 19 7 30 20 7.1 31 20.5 7.3 32 21 7.3
