A gravel grinder that turns into singletrack asks a lot of a rider's seat and hips, and the Assos TACTICA HP Shorts Liner is a padded mountain bike liner short that covers both with a 9mm insert and two removable hip pads. The Polstar mesh breathes and speeds moisture evaporation, and superlight leg grippers hold the legs securely. The mesh is too light to wear without an over short. What Our Gearhead(R) Experts Are Saying:"On long days that mixed gravel and singletrack, the insert moved with my hips instead of against them, which kept the last climb as smooth as the first. The seams stayed out of the way against my skin."