Siren 4 Thermo Mid Zip WP Boot Wmns earth management Elevated with advanced insulation and

Elevated with advanced insulation and material technologies

Old school and still cool

Ultra-Wide

Hinged construction for premium fit

capitalizing on the values that make SPEEDCROSS legendary

Siren 4 Thermo Mid Zip WP Boot Wmns earth management Elevated with advanced insulation andWith 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 200 grams of added insulation for warmth and protection. Now equipped with SOLARCORE insulation, lightweight insulation material initially designed for NASA, you never have to worry about warmth. The all new medial zipper provides easy on off,