Ranger Tundra II 11" Women's Thermolite Winter Boots, Black & Pink (RPW112) Durable nylon upper is water-resistant to rain, snow and splashes 3/4" removable polymeric foam liner and 400-gram Thermolite insole for superior warmth; comfort rated to -50 F (-46 C) Instep cinch system for easy on/off TPR shell with rubber sole is waterproof up to stitch line of TPR shell Rugged outsole grips surfaces for fewer slips and falls