This liner's chamois really smooths out the bumps and chatter from tricky rock sections. --Gearhead Expert MaxWhen we are looking to improve our comfort on the bike, the Backcountry MTB Bib Short Liner is a game changer. Featuring a nylon-spandex blended fabric and a compressive fit, the MTB Bib Short Liner is super comfortable and gives us the support we need for long days in the saddle. These bib liners have an integrated low-profile chamois for improved comfort and reduced fatigue, and silicone leg grippers ensure the liners never ride up. For the finishing touches, we added mesh side and back panels to improve our airflow for those hot summer rides.