With 25 years of Merrell’s women’s-specific fit, the Siren 4 Thermo is uniquely engineered to cradle the distinct contours of female feet, providing comfort, support, and stability even on the longest hikes with added insulation for warmth and protection.

Features:
Waterproof membrane seals out water and lets moisture escape
Protective shell keeps feet dry
Waterproof suede leather upper
100% recycled laces and webbing
Bellows tongue keeps out debris
100% recycled fleece lining
100 grams Primaloft Gold Eco Series synthetic insulation
Rock plate for protection
FloatPro Foam midsole for a lightweight ride that lasts
Vibram Icetrek outsole designed to provide the improved grip on very cold, icy, or snowy surfaces
Lug: 5mm
1lbs-16oz, 900g