Merrell Women's Siren 4 Thermo Mid Waterproof With 25 years of Merrell's women's-specific fit, the Siren 4 Thermo is uniquely engineered to cradle the distinct contours of female feet, providing comfort, support, and stability even on the longest hikes with added insulation for warmth and protection. FEATURES • Waterproof membrane seals out water and lets moisture escape• Waterproof full grain leather and wool upper• Bungee lace with toggle closure for a secure fit• 60% recycled laces• Bellows tongue keeps out debris• Protective and abrasion resistant rubber heel and toe cap• 100% recycled fleece lining• 200 grams Primaloft® Gold Eco Series synthetic insulation• Rock plate for protection• FloatPro™ Foam midsole for lightweight comfort that lasts• Vibram® Icetrek outsole designed to provide the improved grip on very cold, icy, or snowy surfaces Merrell Women's Siren 4 Thermo Mid Waterproof - J036660 - Oak