If you look at the base of your ski /snowboard and run your fingers along the surface from edge to edge, you will should see and feel a grain, like thin lines carved into the base from tip to tail. This is your base structure, and it is very pronounced on a brand new ski/snowboard, but will wear and flatten out with use, particularly under the contact points. As a base begins to loose its structure and the texture of this “grain” is lost, it will loose its ability to hold and wax. Even a well tuned ski/board without base structure will feel sticky and sluggish on the snow. A stonegrind will remove the old wax and regrind this structure back into the base of your ski/snowboard. We recommend active winter athletes get a stonegrind at least once at the beginning of each season.