From Stride Rite, the Boys' Lakota M2P Machine Washable Sandals feature:  Synthetic upper Hook-and-loop strap for secure closures and an easily adjustable fit Synthetic lining APMA-approved by team of podiatrists for healthy foot development Ortholite® memory foam for cushioned all-day comfort Flexible construction for natural movement and comfort Wipe-clean for quick and easy maintenance Machine washable on cold cycle and air dry Patented Made2Play® technology Non-marking rubber outsole Imported.