Description
Face winter with confidence in the Merrell Women’s Siren 4 Thermo Mid Zip Waterproof, a boot designed for women who refuse to let cold weather slow them down. Engineered for warmth, traction, and a custom women’s fit, this boot blends outdoor performance with all-day comfort and sleek, modern style.
The upper features a combination of full-grain leather and durable knit fabric, creating a strong yet flexible build that moves naturally with your foot. The waterproof membrane ensures reliable protection from rain, snow, and slush while allowing airflow to keep feet dry and comfortable. A convenient side zipper allows for easy on and off, while the lace system lets you adjust for a snug, supportive fit.
Inside, this boot is built for cold conditions. It’s insulated with 200 grams of PrimaLoft® Gold Eco Series insulation, providing exceptional warmth without excess weight. Beneath that, a SOLARCORE® aerogel insole adds another layer of thermal protection, maintaining warmth even when the temperature drops dramatically. Soft fleece lining enhances interior comfort, wrapping your feet in a cozy layer that feels plush and protective.
Underfoot, the FloatPro™ foam midsole delivers lightweight cushioning that supports your stride without adding bulk. The Vibram® Icetrek outsole features deep, multidirectional lugs that provide confident traction on icy sidewalks, snowy paths, and uneven terrain. A reinforced toe cap and sturdy heel counter offer additional protection and structure for active use.
Sustainability is built into every step. Recycled materials are used in the laces, webbing, lining, and footbed cover—proof that high performance and environmental mindfulness can coexist. The result is a durable, insulated, waterproof boot ready to take on winter in comfort and style.
Whether you’re navigating a mountain trail, shoveling snow, or heading out for errands on a frigid morning, the Merrell Women’s Siren 4 Thermo Mid Zip Waterproof offers the perfect combination of warmth, traction, and modern design—all tailored to a woman’s natural movement and shape.
