Ranger Flintlock III Men's Leather Thermolite Winter Boots, Black (RP118) Stylish leather upper; 3/4" removable polymeric foam liner insulates to keep feet warm; comfort rated down to -50 F (-46 C) Large-toothed front zipper and woven nylon pull loop at back for easy on/off 400-gram Thermolite insole for superior warmth TPR shell with rubber outsole is waterproof up to stitch line of TPR shell for protection in slush and puddles Utila-Trac molded outsole grips surfaces for secure footing over icy, snowy terrain; back heel kick-off molded into boots for quick removal