Nike Sunray Adjust Infant Sandals FLEXIBLE, LIGHTWEIGHT COMFORT FOR ALL-DAY FUN. The Nike Sunray Adjust 5 is built to keep up with little ones in water, on land or wherever adventure takes them. The quick-dry design has a strap on top and behind the heel to keep it from slipping off. Lightweight, flexible foam provides durable cushioning that lasts. > Synthetic material dries quickly. > 2 hook-and-loop straps on top and behind the heel keep it from slipping off. > The straps open all the way up to make it easy to get on and off. > Soft, flexible foam provides lightweight, durable cushioning.