I got this one and so far it's been good. I've only had it for 2 weeks so I know it can still yellow, but they have a lifetime warranty so hopefully they'll take care of it if that problem arises in the future.
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I have been really happy with Air Jacket from Power Support so far. It is hard plastic, so it can scuff, but with a white phone behind it the scuffs do not show very much. Very clear and very precise construction. Looks great on gold iPhone.