After trying other thumb grips that kept falling off I thought this was the answer. They fit well and feel good on my thumbs. After a few weeks, however, I noticed that flakes of material were falling off under the thumbsticks. I found that the grips gradually fell apart the more I used them. I've continued to use them because I like the feel, but today the left thumb grip has finally worn out completely. They were great while they lasted, but they didn't last long enough. I feel like a dual material handle could work better. an inner stiffer layer that snaps onto the stick that can be molded with TPU material. Again, I enjoyed them while they lasted.