For my 6 Plus I've had the red leather (got chewed up by the cat), red silicone (cats victim number 2 - apparently the colour red isn't appreciated heh), the black leather Apple case, Incipio feather clear, Powersupport Air Jacket, Powersupport arc bumper, and a couple of super cheap Monoprice anti shatter ultra thin shells - one frosted clear and the other smoke. I really, really like the Powersupport cases (my leather Apple case is still my all time favorite though) but ever since the Monoprice ones arrived they are all I use - they are even thinner than the Powersupport Airjacket and add enough grip. I'm thisclose to just doing completely caseless though and letting my AppleCare Plus do its job, but for the ability to use the phone with a case that still doesn't feel like there's a case on, and for $5, the Monoprice ones can't be beat.
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