Review on Xbox One Controller Protective Case - CALLANY 3 Pack Soft Silicone Cover Skins with Thumb Grips Set for Enhanced Grip and Anti-Slip Functionality by Monica Hall

What I was looking for was something that would get sticky and not slip. It's not like this. It was still a bit slippery. I also didn't like how he covered the entire controller with buttonholes. All it has to do is cover the "horns" of the controller you're holding it on. I ended up having some 4x4 pads that I wrapped around the areas of the controller that you hold on to and it works a lot better.