Gear up with no fear when you're braving rough terrain and even rougher weather, with the Thermo Chill Mid Shell boot from Merrell. This winter overachiever features a protective rubber shell for all-over defense from snow and low-bulk insulation for all-around warmth in cold temperatures. A metal hook lacing system keeps you secure while the bellows tongue keeps debris out for an ultra comfortable experience. 200g of M Select™ WARM keeps you warm while staying lightweight. The M Select™ GRIP outsole has deep 5mm lugs that provide ultra grippy traction on a variety of surfaces