Let the fun begin in the Crocs Classic Clog. Ethylene vinyl acetate upper and insole. Unlined. Iconic Crocs Comfort. Find Your Size: We recommend sizing down (e.g. if you are a 7.5, size down to a 7) Ventilation ports add breathability and help shed water and debris. Pivoting heel straps. Slip-on style in a round toe silhouette.