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

and breathable mesh zones increase its comfort

87% Recycled polyester strobel board

That's where the Cloud Sky comes in

FEATURESAccu-Fit TechnologyTurn Welt Top with TabExtended Arch SupportErgonomic Fit HeelBreather PanelSeamless Toe ClosureCompression Construction

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