Nuptse Chukka NF02273 TNF Black/TNF Black 27.0 cm Winter Boots These functional winter chukka boots provide comfort during the winter season with their excellent heat retention. The upper features a water-repellent, recycled PET ripstop material, and the insulation is made of 100% recycled polyester wadding, which is less likely to lose its function when wet. This construction is environmentally friendly while enhancing functionality. The heel area incorporates a cushion pad to enhance cushioning and hold. The midsole uses lightweight, high-rebound compression-molded EVA, and the outsole employs 20% recycled original rubber, which offers a balance of durability and grip. Materials: [Upper] Water-repellent recycled PET ripstop, 100% recycled polyester wadding, adjustable shoe laces, canvas mudguard [Bottom Unit] Compression-molded EVA midsole, Surface Control(TM) 10% natural rubber sole [Function] Recycled PET upper/100% recycled polyester insulation/Easy on-off design/20% recycled Surface Control rubber outsole These boots have only been worn a few times, so the soles show little wear and are relatively clean. They cost around 21,000 yen on Amazon.