Siren 4 Thermo Mid Zip Waterproof Flip Flops and breathable mesh zones increase

and breathable mesh zones increase its comfort

which is softer and stronger than others

Built-in stretch cuff for less bulk

FABRIC: 88% Polyester-recycled 12% Elastane

Siren 4 Thermo Mid Zip Waterproof Flip Flops and breathable mesh zones increaseA winter ready boot with a women's specific fit that combines function and all day wear ability. Best for: Winter HikeInsulation: 200 grams Primaloft Gold Eco Series synthetic insulation. SOLARCORE Aerogel insole provides underfoot superior warmth while being extremely flexible and ultra thin. Waterproofing: Waterproof full grain leather upper, complete with a waterproof membrane seals out water and lets moisture escape. Traction: Vibram Arctic Grip