I had very specific criteria on the choice of the back cover and there I'm really happy with my purchase ... Thin shell and silicone material which gives the feeling of having well in hand the iPhone. No bubbles on the back and although it covers all gilded edges on the front of the iPhone without distorting it ... to see if it turns yellow in time! but I think for the price, I'll buy another one to replace it when it is worn! ^^