Women's Siren 4 Thermo Mid Zip Waterproof Size:8.5 more sustainably sourced fabrics

more sustainably sourced fabrics

fore and aft ABS bulkheads

Modest enough for a Victorian aristocrat

The agility of a light hiker with the warmth of a down jacket

So you can tackle more trails and enjoy more summits

Women's Siren 4 Thermo Mid Zip Waterproof Size:8.5 more sustainably sourced fabricsWith 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,