Synthetic Imported Rubber sole REEF KIDS AHI BOYS SANDALS: Reef??s best-selling flip flops for boys are handcrafted for comfort with a soft footbed and durable outsole giving you the perfect blend of beach style and satisfaction SOFT FLIP FLOPS FOR KIDS: The flexible and durable high-density EVA outsole is designed with fun prints for the grom who doesn??t stop ARCH SUPPORT: Outfitted with anatomical arch support to keep your feet comfortable through every adventure with these boys sandals BACKSTRAP: First 4 toddler sizes (3/4,5/6,7/8,9/10) come WITH removable back strap, little kid & big kid sizes DO NOT HAVE back strap. BEACH FREELY WITH REEF: We are encouraging people around the world to embrace the fun, freedom and spirit of the beach while living life by one simple rule: Beach Freely. Our products are designed to make you feel comfortable, relaxed and free in any environment, whether you’re at the beach or not.