Most other flip flops on the market are made from EVA or PVC plastic, so they are hard on the feet, make feet sweat and can dry up and crack. But Cariris are made from rubber, so they bend and breathe. They work with you, not against you.Our Catalogue for South East Asia.ost other flip flops on the market are made from EVA or PVC plastic, so they are hard on the feet, make feet sweat and can dry up and crack. But Cariris are made from rubber, so they bend and breathe. They work with you, not against you. Our Catalogue for South East Asia.