Reef Boys Grom Rover Sandals | Flip Flops for Toddlers, Boys with Soft Cushion Footbed | Waterproof Synthetic Imported Rubber sole Synthetic nubuck upper with jersey liner Super soft compression molded eva foot bed Instant comfort First 4 toddler sizes (3/4,5/6,7/8,9/10) come with removable back strap, little kid & big kid sizes have no back strap