Merrell Women's Siren 4 Thermo Mid Zip Waterproof Hiking Boot Antimicrobial I'm green™ bio-based EVA (over

I'm green™ bio-based EVA (over 50%) which is lightweight and cushioned for shock absorption

Vionic active footwear features Advanced Motion System (AMS) technology

Metallic Tumbled Leather

Fully lined in a cozy micro-fleece that quickly wicks moisture away from your skin

the Madison boasts a midsole made of memory foam and ultra-light cork

Merrell Women's Siren 4 Thermo Mid Zip Waterproof Hiking Boot Antimicrobial I'm green™ bio-based EVA (overA winter ready boot with a women's specific fit that combines function and all day wearability. Features 200 grams Primaloft Gold Eco Series synthetic insulation Solarcore Aerogel insole provides underfoot superior warmth while being extremely flexible and ultra thin Waterproof full grain leather upper, complete with a waterproof membrane seals out water and lets moisture escape Vibram Icetrek outsole designed to provide the improved grip on very