The Siren 4 Thermo is uniquely engineered to cradle the distinct contours of female feet, providing ultimate comfort, support, and stability. Keep your feet toasty warm even on the longest hikes with added insulation and protection.
- Full-grain leather upper is durable and waterproof
- Breathable waterproof membrane seals out water and lets moisture escape
- 200 grams of Primaloft® Gold Eco Series synthetic insulation for lightweight warmth
- Protective and abrasion resistant rubber heel and toe cap
- Bungee lace with toggle closure for a secure fit
- Rockplate adds protection from rough patches on the trail
- Bellows tongue keeps out snow and trail debris
- Thick FloatPro Foam™ midsole provides plenty of cushion and underfoot protection
- Sticky Vibram® Icetrek rubber outsole provides grip in winter conditions
