Aptly named, the Endura Clickfast Padded Liner gets straight to the point. The way you hook it into Endura's Clickfast-compatible shorts is by clicking in tabs. The action is fast and makes a clicking noise. Beyond how it works, this liner boasts a 200-series Endura stretch chamois for shock-absorbing comfort, as well as silicone gel leg grippers to lock in the perfect fit. And while the liner fits like a second skin, it's best worn under shorts.