Blue Polka Dot Flex Gel Case for Iphone 4 & 4S Flex Gel Material, super long lasting Protects against scratches and scrapes Special (Thermoplastic Polyurethane) TPU material which can be twisted without cracking TPU provides the strength of hard case while providing flexibility and durability of a silicone case Baby Blue Polka Dot Flex Gel Case for Iphone 4 & 4S