Muck Boot Arctic Adventure Tall Rubber Women's Winter Boot Synthetic Rubber sole Shaft measures approximately 15.5" from arch Heel measures approximately 1" Boot opening measures approximately 14" around 5 mm neoprene provides comfort and flexibility, along with excellent waterproofing, shock absorption and heat retention properties; adjusts to the shape of your feet to resist blisters and chafing Fleece lining is soft for enhanced comfort, durable for long wear, and provides exceptional warmth in frigid environments; comfort rated from -20 F to 50 F (-30 C to 10 C) Lightweight EVA midsole for additional cushioning, support and impact resistance all day long Lightweight outsole provides traction on slick surfaces and self-cleans to prevent tracking dirt inside; rear pull tab for easy on/off High-grade rubber exterior provides extra toughness and makes for a 100% waterproof winter boot; 16-inch height for maximum protection