Beautifully engineered, comfortable and luxurious, the Castelli Women's Mondiale Bib Shorts feel nearly invisible when you first put them on and after several demanding hours in the saddle. New Cinquanta fabric has a higher rebound and uses a full 50% Lycra content to deliver an insane amount of softness, unprecedented muscle support and improved freedom of movement. The main body has only one taped seam and reinforced no-sew side panels, so there's practically nothing to chafe! No-sew bonded bib straps with laser-cut ventilation on the back enhance overall comfort, plus the SnapLock fastener opens the bibs for nature breaks. New and improved Progetto X2 Air Donna chamois provides the ideal blend of support, ventilation and fast-drying performance for long training rides and competition. Stylish heat transfer logos are reflective for better visibility in low light. Lie-flat leg grippers have a touch of silicone to keep the bib shorts in place.