The FUN-ctional and flirty Birkenstock Kids Mayari Birko-Flor Sandals - Narrow are excellent for warm weather. A toe-loop and two upper straps help provide a grip that stays on your little one's active feet. They're adjustable for a just-right fit with the classy metal pin buckles. The lightweight EVA (ethylene vinyl acetate) sole provides cushioning and shock absorption for all-day fun and comfort. Straps are constructed with Birko-Flor synthetic nubuck material made of PVC (Polyvinyl chloride) and lined with super soft fleece so these sandals are breathable, easy to wipe clean, and soft on the skin.