evo.com | Merrell Shoes > Built on the insulated Siren 4 Thermo platform, the Merrell Siren 4 Thermo Pull-On WP Shoes pair a waterproof full-grain leather and knit upper with 200 grams of insulation and a Vibram Icetrek outsole that bites into ice and packed snow. Waterproof Full Grain Leather and Knit Upper 100% Recycled Laces and Webbing Protective and Abrasion Resistant Rubber Toe Cap 100% Recycled Fleece Lining Waterproof Membrane Seals Out Water and Lets Moisture Escape | Women's Merrell Siren 4 Thermo Pull-On WP Shoes 2026 - 8.5 Brown | Leather/Rubber