Zittop Universal Smart Phone Bumper Case Elastic Soft Silicone Cover for 5.2" Phones Size 4'' to 6.5'' inch Case (Black)

Rubber would slip off bc it is too soft and squishy

The concept is great; protect the phone corners while allowing the phone to dissipate heat freely through the back without the insulating properties of a case. It should provide adequate protection to the phone while helping prevent battery damage through overheating.Unfortunately, the bumper doesn't stay on the phone. Put a phone in your pocket and the bumper comes off rendering the phone unprotected. It's a doable idea, but this bumper is a failure.

I almost returned it, thinking it won't fit my 6 inch long phone. but then I tried putting the two diagonal corners on first, then put on the rest and I managed. I dropped it on the floor a short distance to test and the rubber bumper corners kept the screen from cracking.