Koel Luka winter boots are made of water-repellent leather, have a 100% natural wool lining and a removable wool insole. The boots have an anti-slip rubber sole with a deeper pattern. Suitable for medium-width, short and medium-height feet. Fastening: buckle and laces Upper: Leather Lining: 100% wool Insole: woolen, removable Sole: rubber Made in Portugal Minimalist dimensions for the Koel Luka model Size Inside length 36 23.4 37 24.1 38 24.9 39 25.5 40 26.3 41 27 42 27.5 43 28.1