Muck Boot Chore Kids' Rubber Boot Synthetic Importado Rubber sole Shaft measures approximately 10.25" from arch Boot opening measures approximately 12.25" around 5 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 100% waterproof kids' boots keep feet warm, dry and comfortable through any outdoor activity Lightweight and breathable mesh lining keeps feet well ventilated for long-wearing dryness; comfort rated from sub-freezing to 65 F/18 C Rugged outsole offers durability and traction on slick surfaces Rear pull tab with wide opening allows for easy on-off