Speedy endurancecastelli get a lot of requests for a mid range performance short and this one is special castelli use endurance evolution fabric a high modulous very flat lycra174 fabric that feels extremely dry while giving just the right amount of compression the waist construction eliminates stitching and elastic and lies completely flat finally they use the giro3 leg band from their premium shorts and put in the freshly updated kiss air seat pad giro3leg grippersinstead of stitching