Grips
Overgrip is a thin layer of grip that is put over top of the paddle’s original base grip. Its purpose is to keep the handle surface tacky so that the paddle does not turn in the player’s hand on contact with the ball. It should be changed when it is no longer tacky which is about every 20-25 hours when playing indoors or about every 15-20 hours when playing outdoors.
Replacement grips are replacements for the base grip that originally came installed on the paddle. If the base grip is properly covered with an overgrip from Day One, it will usually last the life of the paddle. However, many pickleball players are not aware of the importance of overgrip, so they end up wearing out their base grips and have to replace them.