This waterproof sneaker features M Select™ DRY impermeable membrane seals out water and lets moisture escape with mesh and TPU upper. Webbing loops for secure fit. Hyperlock™ molded TPU heel counter for security. This sneaker has bellows tongue that keeps debris out. M Select™ FRESH antimicrobial agents reduces shoe odor. It also has Kinetic Fit™ Tri removable contoured EVA insole provides light support to all three arches of the foot.