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Vibram® outsole
Want to keep it aerodynamic in your lowest-profile sneakers
Polyurethane sole
Inspired by our lace-ups made in Tasmania in the 1800s
Merrell Women's Siren 4 Thermo Mid Zip Waterproof Size:10 Vibram® outsoleA winter ready boot with a women's specific fit that combines function and all day wear ability. 200 grams Primaloft Gold Eco Series synthetic insulation. Solarcore Aerogel insole provides underfoot superior warmth while being extremely flexible and ultra thin. Waterproofing: Waterproof full grain leather upper, complete with a waterproof membrane seals out water and lets moisture escape. Traction: Vibram Icetrek outsole designed to provide the
