Reef Little Ahi Flip Flop (Toddler/Little Kid/Big Kid) 100% Synthetic Imported Synthetic sole Heel measures approximately 0.75" Only Toddler sizes (3/4, 5/6, 7/8, 9/10) have with a synthetic back strap. Little Kid and Big Kid sizes do not have the back strap EVA Outsole comfy flip-flop with padded strap and printed footbed Printed contoured footbed; Durable; Water friendly