Upper : Synthetic Leather Upper Insole: EVA Foam with Synthetic Leather provides comfort and cushion Outsole: TPR Sole with High Durability and Anti Slip Size Chart: 38 (24.9cm) 39 (25.6cm) 40 (26.4cm) 41(27.0cm) 42 (27.7cm) 43 (28.5cm) How to measure a good shoe/sandal size: 1. Measure the length of the sole of your foot 2. Then add +/- 1cm from the size of the sole of the foot 3. Match the size with our size chart Example: If your foot length is 24.5cm, we recommend ordering size 39 (25.6cm). Care: Easy to clean with a damp cloth