The waterproof UGG Felton boot features outsoles designed to stay flexible in freezing temps, extra warming insulation, cushioning insoles, and a cold-weather rating of -20C (or -4F). Padded microfiber collar and tongue for all-day wear. Lace-up closure for a secure fit. Cushioning foam insole and lining feature 7mm UGGpure wool to naturally wick away moisture. Internal EVA midsole. Exclusive Vibram outsole. Imported. Measurements: Weight: 1 lb 3 oz Shaft: 7 in Product measurements were taken using size 9, width D - Medium. Please note that measurements may vary by size. Weight of footwear is based on a single item, not a pair.