Castelli's top technologies come together in the Castelli Sorpasso Bib Knickers. Two thermal fabrics, one that is subtly water repellent and another made from of hollow-core fibers that reject moisture, keep you warm and dry. The bib straps are made of seamless Giro++ elastic, for a perfect fit that never constricts. At the ankle cuffs, the same seamless material gently grips your legs. The high-end Progetto X² chamois has a seamless, varied-density cushion layer that is covered by a soft, next-to-skin fabric layer for lasting comfort on long training rides.

• Thermoflex nylon/lycra blend is stretchy, brushed on the inside, and features a silicone finish for light water repellency
• Thermoflex Core Due fabric has a lightweight hollow core polyester inner layer that traps heat and rejects water to keep you warm and dry
• Giro++ seamless elastic bib straps
• Giro++ seamless elastic ankle gripper
• Camlock zippered ankle closure
• Reflective tape at ankle
• Two-layer Progetto X² chamois features gel-like padding under sit bones and perineum
• Recommended for 54 - 68 degrees