Muck Arctic Adventure Tall Rubber Women's Winter Boots Synthetic Rubber sole Shaft measures approximately 15" from arch Heel measures approximately 1" Platform measures approximately 0.5 inches 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