The Konges Sløjd "Merle" frilly heart-print swim shoes are designed to protect against the sun’s UV rays with the highest ultraviolet protection factor, UPF 50+ Flat heel Round toe Heel tab Slip-on style Polyester/elastane Imported Sizing Note: Toddler sizes end in "T"; Youth sizes end in "Y". Toddler sizes are smaller than youth sizes.