Silicone Prism Case - crystal protection. The Prism Case silicone case is made from a modern type of rubberized silicone, thermoplastic elastomer. This silicone is safe for human health and does not harm the environment. Wearing a phone in the case continuously does not cause it to overheat, unlike cheaper silicones. The Prism Case silicone is a transparent, resilient, and quite flexible case. Over time, it does not stretch or become cloudy. Its back panel has a crystal structure within the inner volume. The case itself is not glossy, but the crystal edges create an effect of sparkle, color shifting, and radiance in the sunlight. The dimensions of the Prism Case closely follow the contours of the phone and its functional ports. Small bezels around the camera, speakers, flash, and touch screen effectively protect the phone from drops and impacts. The volume buttons and the sleep button are covered, providing full protection from water and dust. The ports are open and easily accessible. The Prism Case silicone has