Sizes 3/4 Infant - 9/10 Toddler ONLY have an elastic backstrap which can be permanently removed. Like a fish to water he was born to wear these sandals! Synthetic strap features a soft polyester liner for added comfort. Printed EVA footbed is contoured to better fit your kiddo' s foot. High-density EVA outsole for durability. Measurements: Weight: 2 oz Product measurements were taken using size 9-10 Toddler width M.Weight of footwear is based on a single item not a pair.