Merrell Siren 4 Thermo Mid Zip WP hiking boots

Experience ultimate warmth and a perfect fit with the Siren 4 Thermo. Built on 25 years of women´s-specific design, it cradles your foot for superior comfort and stability on the longest hikes. Stay toasty with 200g of insulation and a NASA-inspired SOLARCORE® aerogel insole. A waterproof upper keeps you dry, while the new medial zipper allows for easy on/off. Confidently tackle icy, slippery terrain thanks to the superior grip of the Vibram® IceTrek™ outsole with enhanced traction lugs