Polyurethane midsole for improved cushioning. XRD® technology in the heel for shock absorption. Washable Comfort Lite footbed. ① Leather Liner Features a 0.8mm thick leather lining. Improves heat retention and makes it easier to put on and take off the boots. ② Self-Cleaning Sole Grooves running vertically and horizontally enhance flexibility and provide a self-cleaning function for excellent mud release. ③ 300°C Heat-Resistant Sole The Vibram Sole boasts functionality that can withstand temperatures up to 300°C and as low as -15°C. ④ Slip-Resistant Rubber Sole Provides excellent grip even in slippery environments. The sole is soft and cushioned. Also complies with Australian Standards (correlated with ISO 20437 for ISO safety footwear and "Personal protective equipment - Footwear" standards). Size: 3 (Equivalent to 22.5~23.0cm) Color: Black I think they would look great with denim! Please consider purchasing. Color: Black系 (Black-based) Material: Genuine Leather Condition: No stains, tears, or odors.