W's Siren 4 Thermo Mid Zip Waterproof tools-equipment Cushioning That Keeps Up

Cushioning That Keeps Up

even if burying is permitted by the land management agency

Excellent weight-to-performance ratio: standard-sized

A new season calls for new gear to play your favorite sports—or just getting outside for fun

Your new go-to

W's Siren 4 Thermo Mid Zip Waterproof tools-equipment Cushioning That Keeps UpWith 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,