Merrell Siren 4 Thermo Mid
• Waterproof membrane seals out water and lets moisture escape
• Waterproof full grain leather and knit upper
• 100% recycled laces and webbing
• Heavy-duty 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® insulation with Aerogel provides underfoot superior warmth while
being extremely flexible and ultra-thin
• 100% recycled mesh footbed cover
• NXT treated to prevent odour
• 5% recycled PU removable 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
• Stack Height: 28.5-20.5mm
• Drop: 8mm
• Lug: 5mm
• 2lbs-6.07oz, 1080g