Rubber soleHeel measures approximately 1 inches"[ GOOD MATERIAL ] - Cozy and Soft PU Leather Upper and Comfortable Soft Rubber Sole with Anti-skid Design, Skin-Friendly without any Stimulation to the Skin of Kids.[PRACTICAL DESIGN]- Anti-Collision Round-Toe Protects Kids' Toes and Keeps them Comfortable. The Boots are waterproof and Warm, Kids Can Play Outdoor in the Snowy Day,Go Hiking, Wearing the Boots.[ EASY WEAR ] - A Side Zipper Closure makes Our Little Boots Easy to Put On,Take Off and Stay on Your Kids'Feet all Day and Won't be Kicked off.[ STYLISH APPEARANCE ] - The Fashion and Classical Appearance is Suitable for any Occasions like Walking,Family Gathering,Hiking,Photography,Indoor and Outdoor Playing.Best Birthday Gift Idea.[ SIZE TIP ] - The Recommended Age is just for Your Reference,Please Refer to the Size Chart and Measure Your Kid's Feet Before Ordering the Little Boots.