The Merrell Women’s Siren 4 Thermo Mid Zip Waterproof Boot is a 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® Arctic Grip™ All Terrain outsole designed to effectively extend the winter traction season, due to the enhanced durability and versatility.
• Heavy-duty, Waterproof, YKK zipper for easy on and off
• Protective and abrasion resistant rubber toe cap
• Cleansport NXT™ treated for natural odor control
• FloatPro™ Foam midsole for lightweight comfort that lasts
• Waterproof full grain leather and knit upper
• 100% recycled laces and webbing
• 100% recycled fleece lining
• 100% recycled mesh footbed cover
• 5% recycled PU removable footbed
• Stack Height: 28.5-20.5mm
• Drop: 8mm
• Lug: 5mm
• Half pair weight: 1lbs-3.04oz, 540g