In stock
Color: Black
Merrell Siren 4 Thermo Pull-On Waterproof is listed at Zappos for $179.95. Sizes in stock: 6, 6.5, 7, 7.5, 8, 8.5, 9, 11. Last updated Oct 29, 2026.
Effortless warmth meets cold-weather-ready performance in the Merrell® Siren 4 Thermo Pull-On Waterproof boots. Designed with 200 grams of Primaloft® Gold Eco Series synthetic insulation, faux fur lining, and Vibram® Icetrek traction leather outsole, they keep feet cozy and secure in snowy, slushy conditions. Their waterproof membrane seals out water and lets moisture escape, while the FloatPro™ foam midsole with exceptional energy return and enduring comfort makes them comfortable for all-day wear. These ankle-high boots feature a zippered side closure and a heel pull tab for easy wear.
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