Muck Boot Kid's Muckster Ankle Boot, Navy & Lime Rubber sole Shaft measures approximately 5.5" from arch Platform measures approximately 0.5 inches 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