Slip Stoppers aka Gripper Pad or Non Slip Pads
Futon mattresses have a tendency to slip and move around on a frame. A Non-Slip Gripper Pad eliminates this problem.
Non-Slip Gripper Pad is placed underneath the futon mattress, on the seat deck and keeps the futon mattress from moving, slipping and sagging.
Futon Life recommends a minimum six-inch thick futon mattress for use on Tri-Fold futon frame and a minimum eight-inch thick futon on any Bi-fold (2 fold) convertible futon frame. A thinner mattress is acceptable, but only as a rolled-up, closet-stored, floor or tatami mattress. The six-inch measurement applies not only to the new product but also to how thick it remains over its usable life.
To measure thickness of your futon, go to the middle of the side, place a hand on the top and bottom of the mattress, and squeeze your hands together gently. Measure the distance between your two palms. If it is not a solid five inches, the mattress does not meet the minimum. Please remember that this method is not scientific since each person’s concept of “gentle” is subjective. Close to five inches is good. Three inches is not.