W's Siren 4 Thermo Mid Zip Waterproof tools-equipment Blue encourages better mind flow

Blue encourages better mind flow and performance

Cushioning That Keeps Up

acid and organic fat resistant

Interior security pocket and zippered hand pockets for valuables

W's Siren 4 Thermo Mid Zip Waterproof tools-equipment Blue encourages better mind flowWith 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,