The Merrell Men's Thermo Shiver 6" Waterproof Hiking Boots are where an ultra-light shell meets max-level protection. Outlast the elements in a boot that delivers a feather-like feel and soft lugs for traction. It has a waterproof suede upper and a TPU waterproof shell to keep moisture out. They have a bellows tongue to keep debris out. The M Select™ GRIP Tunes each Outsole with Durable Traction that Grips when and where you need it with a 5mm lug depth.