GORE-TEX® waterproof membrane, exceptional breathability and waterproof performance Breathable mesh and TPU upper 100% recycled laces and webbing Bellows tongue keeps out debris Protective and abrasion resistant rubber toe cap 100% recycled breathable mesh lining 100% recycled mesh footbed cover NXT lined footbed cover to prevent odor Removable PU footbed Fitting: Standard Size: 4-8 UK Merrell Womens Siren 4 GTX Black Waterproof Trainers J037274