100% rPET webbing with low-water usage dyeing technique Ariaprene® with recycled foam and 100% rPET

featuring a full inside zipper for easy on/off and a back zipper for calf adjustability

they’re pure comfort inside

No-sew mid-foot support

Women's Merrell Siren 4 Thermo Mid Zip Waterproof Boot Color:DIORITE 100% rPET webbing with low-waterMADE FOR: Winter Hike TRAIL TYPE: Moderate A winter ready boot with a women's specific fit that combines function and all day wearability. INSULATION RATING: Warmer Waterproof exteriors and 200 grams of insulation will keep you dry and warm for your typical cold weather winter activities. 200G Synthetic Insulation Waterproof Vibram Icetrek 200 grams Primaloft Gold Eco Series synthetic insulation Solarcore Aerogel insole provides underfoot superior