The Castelli Superleggera Bibshort is designed for the hottest conditions and is the latest iteration in Castellis quest to build the most lightweight bibshort. Castelli has been developing lightweight bibshorts since 2011 but when designing the Superleggera Bibshort Castelli went back to the drawing board to rethink every aspect of the shorts design. Castelli decided that what the short needs to do is hold the seat pad securely in place while adding as little weight as possible and retaining durability. The solution was to engineer a brand-new fabric that is woven rather a knit saving 30 in weight for the same level of support. Castelli also worked with a world leading mill to create a graded fabric that becomes increasingly lighter the further down the leg it extends. At the lightest point this fabric weighs 90g/m² compared to normal short fabric which weighs roughly ²²⁰g/m². The result of these new technologies is a bibshort that weighs an incredibly light ¹⁴¹g in size large. The fabric construction saves weight but it really comes into its own when riding hard in hot conditions as it absorbs ³⁰ less moisture compared to normal short fabric. This means that while the fabric saves ⁴⁸g in weight when dry it saves closer to ¹⁵⁰g when youre sweating your way up Cols and pushing yourself to your absolute limit.Key Features Premium lightweight short for hot weather Gradient stretch woven fabric for minimal weight with optimum support Minimalist stripe mesh bib to minimise weight and keep you cool Integrated gripper elastic to keep shorts in place Progetto X² Air Seamless seat pad Temperature comfort range of ²⁰ to ⁴⁰C Weight ¹⁴¹g (Large)