The transparent cases offered by Spigen in TPU are ideal for your iPhone or your Samsung. They will fit perfectly to your smartphone and fit the contours while having recesses to circumvent the keys that should not be covered.
They are flexible and are made of TPU.
TPU is a high-end plastic chemically reinforced to be twice as strong, resistant to scratches and greasy stains. It absorbs shocks. Moreover, this kind of plastic does not deform and is quite pleasant to the touch.
Here is the list of Spigen cases corresponding to each Smartphone: