Merrell Siren 4 Thermo Mid Zip Black

Waterproof full grain leather and knit upper with waterproof membrane seals out water and lets moisture escape Heavy-duty, Waterproof, YKK medial zipper for easy on and off with a bellows tongue keeps out debris. The protective and abrasion resistant rubber heel and toe cap keep feet safe and secure all day 100% recycled fleece lining, 200 grams Primaloft Gold Eco Series synthetic insulation and SOLARCORE Aerogel insole provide superior warmth while being extremely flexible and ultra-light FloatPro Foam midsole for lightweight comfort that lasts Vibram Icetrek outsole designed to provide improved grip on very cold, icy, or snowy surfaces, while the Vibram traction lugs are specifically designed to increase traction and shed debris with each step