This style fits true to size, order your normal size. Upper: Nylon fabric with sidequarter zipper for ease of entry and better fit. Waterproof Lining: Extra warm and comfortable synthetic sherpa with HEAT-MX insulation and breathable waterproof membrane Lining of insock: Foam backed brushed textile for added comfort Insole: Moulded EVA cushioning for added comfort, support and shock absorbency. Removable for easy replacement, if needed. Outsole: Durable TPR with high traction sole engraving Round toe