Muck Boot Kid's Muckster Ankle Boot, Black Rubber Rubber sole Shaft measures approximately 4" from arch 4 mm neoprene provides comfort and flexibility, along with excellent waterproofing, shock absorption and heat retention properties; adjusts to the shape of little feet to resist blisters and chafing High-grade rubber exterior provides extra toughness and makes for a 100% waterproof kids' boot; 6-inch height protects ankles Lightweight and breathable mesh lining keeps feet well ventilated for long-wearing dryness; comfort rated from subfreezing to 65 F/18 C High traction rubber outsole helps prevent slips and falls Rear pull tab with wide opening allows for easy on-off