Designed for the long haul, the Castelli Men's Endurance X2 Bib Short keeps you cranking in cloud nine comfort, mile after blissful mile. The Endurance X2 Bib Short precisely wraps your body with its eight panel design and compressive fit. Endurance Evolution fabric rapidly wicks moisture off your body while supporting key muscle groups on the road. Castelli tweaked their signature bib straps for an enhanced fit across a wide variety of body types. Sitting at the heart of this bib short, the Progetto X2 Air chamois promotes breathable comfort as its name suggests. Its absence of seaming or folds sits smoothly against your skin, with a bacteriostatic layer that prevents saddle sores during long grinds and endurance efforts. Four way stretch fabric conforms to your every movement, with multi density padding for relief from saddle pressure and unruly road vibration. Preventing the bottoms from riding up, Giro 3 leg grippers retain a secure fit while sitting flat against your skin for irritation free wear. Castelli placed reflective tabs along the back of the legs for added visibility when you're finishing late evening rides or racking up miles at dawn.