Mud pies and capture the flag have met their match. Chaco's LUVSEAT platform promotes healthy body alignment, while Custom Adjust’em straps allow for easy on-and-off. Adjustable polyester strapping system uses pull-through design to give a secure fit Molded polyurethane topsole midsole units offer durable, dependable cushioning EcoTread rubber outsoles contain 25% recycled rubber and offer great traction Toss into washing machine for easy cleaning or clean by hand Best Use:   Multisport Upper:   Polyester webbing Topsole / Midsole:   Polyurethane Outsole:   Rubber Kids' Z/1 EcoTread Sandals I bought these for my daughter to wear while we kayak and play in the water and they do great protecting her feet and they are comfortable. Excellent product. My daughter loves them.