But they quickly ?air up? and are absolutely amazing. They affix solidly to the tile, dont come off in the shower and hold things securely. But for my use case, circumstances, and workflow this is a terribly crippled product, which is why Im returning it ASAP to resolve buyers remorse. I was concerned this might result in rubbing in this area, however, after a week of use, that included emersion in salt water and then a walk of 2km, that concern seems unfounded. So too, I could make out detailed sounds which could not otherwise be heard at all through speaker or cheap headphones. Have to say, though, I wouldnt have ordered them at all without free returns. It was easy to set up for one of my bikes (a Trek), but wouldnt work with another of my bikes (a foldable Dehon). I am definitely keeping the load light however, don?t want anything to break. This is a huge deal breaker for a wireless mouse, especially when the marketing incenuates that it is for gaming. They stuck the shipping label right to it, so it wasnt cushioned for shipping at all.