Get ready for rugged trails and cold weather adventures wearing the Merrel® Siren 4 Thermo Mid Zip Waterproof boot. 100% recycled fleece lining. 100% recycled laces and webbing. 100% recycled mesh footbed cover. 100% recycled removable PU footbed. 200 grams of Primaloft® Gold Eco Series synthetic insulation. Bellows tongue keeps out debris. Cleansport NXT™ treated for natural odor control. FloatPro™ Foam midsole for lightweight comfort that lasts. Protective and abrasion-resistant rubber heel and toe cap. SOLARCORE® Aerogel insole provides superior warmth. Vibram® Icetrek outsole provides improved grip on cold, icy, or snowy surfaces. Vibram® traction lugs increase traction and shed debris with each step. Waterproof full grain leather and knit upper. Imported.