Yes, just like tyres on a road, the friction from the grip will wear them down over time. We're constantly improving this longevity, but how long will depend on a ton of factors. Our expected life span would be between 5-18 months depending on usage. But again many things can affect this from volume, size of the athlete, bar types used, conditions, care, technique, types of movements and so on. All grips come with a 6 month warranty*Note: Even though our cut of the Kevlar is much smoother than other grips you'll see out there, some fraying out the sides is expected.