100% waterproof and salt-proof leather with real sheep wool lining inside. Warm up to -30°C with an amazing rubber outsole that offers lots of traction.  Lace-up and zipper on the inside for optimal adjustment.    More info: Material: Leather and nubuck Waterproof materials with sealed seams (AquaProtect®) Removable carbon insoles Natural rubber outsole Wool lining Side zip Heel height:1.5” Shaft height: 4.25” Circumference: 9”