The friction grip pads for the REV2 Lite are very tough, but after some time in harsh conditions they may need to be replaced. These are just peel and stick, which makes applying them fairly easy. (Be sure to thoroughly clean the area with rubbing alcohol before applying, or the adhesive may not bond with the plastic well.) Sold in Pairs only.
All replacement friction grip pads come with a special 3M adhesive backing that helps them adhere to the device material.