After 2-3 weeks, use the envelope has discolored, it is now slightly bluish -.- I have the envelope with the Iphone always getragen.Eigentlich absolutely not discolored in a normal jeans brands in order the cover, but this is the Cover very favorable. Who needs a fast hull and do not want to spend a lot and does not disturb the discoloration that can access. All others I advise to better quality shell (Tip the Iphone6 is not a cheap mobile phone, which should not be protected by a cheap envelope)