It is the iconic clog that started a comfort revolution worldwide. The irreverent comfortable shoe you're sure to fall deeper in love with day after day All Crocs shoes are uniquely designed and manufactured using our closed-cell resin, Croslite, a technology that gives each pair of shoes the soft, comfortable, lightweight and non-marking qualities that Crocs wearers know and love. Warmth: Do not expose your Crocs shoes to extreme heat or intense sunlight for a long time. Due to the unique nature of PCCR Crocs material, high temperatures may deform them. Crocs Shoes should only be washed by hand. If the model has a lining, it is recommended to put the liner in a mesh fabric or use a gentle cycle (up to 30°) if you machine wash. Cleaning your Crocs using the washing machine is at your own risk.