Unlike other mountain bike liners, this one actually stays in place thanks to the silicone leg grippers. --Gearhead Expert SammyConstructed with a silky smooth spandex blend, the Backcountry MTB Liner Short is here to round out our trail kit with breathable, wicking performance. The compressive fit conforms to our body's exact shape, while the low-profile chamois smooths out chunky terrain and impact from drops. We even threw in Italian-made leg grippers with a slim layer of silicone to keep the short comfortably in place through all of our riding positions.