Hydro-suede and full grain leather reinforcement upper Original shearling lining ALASKA outsole by OC System® Additional ISOWARM insole made of 90% wool Laces with sturdy metal eyelets and robust zipper located on the inside of the boot BREATHTEX waterproof membrane Comfort zone up to -30°C Sizes ranging from 36 - 43 Boot height: 7" - 17.8 cm