Castelli Size Chart For 2019 the Free Aero Race bibshort has been updated to make it even better. There's a new leg gripper that still features a lie-flat raw-cut edge but now has vertical silicone stripes to keep it in place without restricting stretch. The seams have been updated to improve the fit and make the short look even better on the body. Castelli re-engineered the bib straps with new fabrics and construction so they stay cooler, lie flatter and are more durable. It also receives the redesigned Progetto X2 Air seamless seat pad featuring the softest surface fabric you've ever felt in a seat pad. You'll be glad Castelli ignored the old saying, "If it ain't broke, don't fix it". Features: - Vortex dimpled fabric on legs for aero performance - Forza fabric on inner legs with 38% Lycra(R) content for perfect fit - Stripe mesh engineered minimalist bib construction keeps you cool - Giro4 leg gripper elastic for better grip distributed over larger area - Doppio V construction in front for increased support and comfort - Flat-lock stitching - Progetto X2 Air Seamless seat pad - Temperature range: 15deg-35degC / 59deg-95degF - Weight: 72g