From UGG®, the Butte Waterproof Leather Cold Weather Boots feature: Waterproof leather upper 5 mm non-wicking lace 17 mm UGGpure™ wool lining DryTech waterproof/breathable bootie construction Cold-weather rated to -20 C Approx 7.5" shaft height Removable and replaceable 7 mm curly UGGpure™ wool insole Exclusive Vibram® outsole with the TC1 wet/now compound and a repeating lug pattern to maximize surface contact and provide malleability at the foot's natural flex points outsole These are a mens size 8.5. On the website it calls these men- they fit me as a woman’s 9.5