With 25 years of professional craftsmanship and Merrell's women's-specific fit, the Siren 4 Thermo Mid Zip is specially designed to provide comfort, support, and extra warmth with 200 g of SOLARCORE® insulation made for NASA. A medial zipper allows for improved ease of use while the waterproof upper keeps your feet dry. And Vibram® IceTrek® and traction lug provide reliable traction in slippery conditions.
• Waterproof membrane seals out water and lets moisture escape
• Waterproof full grain leather and knit upper
• 100% recycled laces and webbing
• Heavy-duty, Waterproof, YKK medial zipper for easy on and off
• 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
• SOLARCORE® Aerogel insole provides underfoot superior warmth while being extremely flexible and ultra-thin
• 100% recycled mesh footbed cover
• Cleansport NXT™ treated for natural odor control
• 5% recycled removable PU footbed
• FloatPro™ Foam midsole for lightweight comfort that lasts
• Vibram® Icetrek outsole designed to provide the improved grip on very cold, icy, or snowy surfaces
• Vibram® traction lugs specifically designed to increase traction and shed debris with each step
• Stack Height: 28.5-20.5mm
• Drop: 8mm
• Lug: 5mm
• Half pair weight: 1lbs-3.04oz, 540g
With 25 years of professional craftsmanship and Merrell's women's-specific fit, the Siren 4 Thermo Mid Zip is specially designed to provide comfort, support, and extra warmth with 200 g of SOLARCORE® insulation made for NASA. A medial zipper allows for improved ease of use while the waterproof upper keeps your feet dry. And Vibram® IceTrek® and traction lug provide reliable traction in slippery conditions.
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