Designed for colder conditions, the Siren 4 Thermo Lace WP delivers warmth, waterproof protection, and a women’s-specific fit. Featuring Primaloft® insulation, faux fur lining, and Vibram® Icetrek traction, it’s built to handle snowy sidewalks and chilly trail days. Lightweight FloatPro™ foam adds lasting comfort without the bulk of traditional winter boots.

• Waterproof membrane seals out water and lets moisture escape
• Waterproof coated leather upper
• Waterproof pig suede leather upper
• Medial zipper for easy on and off
• 100% recycled laces
• Bellows tongue keeps out debris
• TPU waterproof shell for additional protection
• Faux fur lining
• 200 grams Primaloft® Gold Eco Series synthetic insulation
• FLOATPRO FOAM™ footbed for enhanced cushioning and energy return
• 100% recycled mesh footbed cover
• FloatPro™ foam midsole with exceptional energy return and enduring comfort.
• Vibram Icetrek outsole designed to provide the improved grip on very cold, icy, or snowy surfaces