Designed in collaberation with Castelli. Different sizes available. Male/Female. Side Panels – Bottom Back: 81 % Polyester 19 % Elastane, Crotch – Bib Straps: 80 % Polyamide 20 % Elastane, Bottom Legs: 67% Polyester 35 % Elastane, Back: 74 % Polyamide 26 % Elastane, Kiss Air Seat Pad: A stretchy, soft skin-care layer provides total freedom of movement with minimum bulk. Dual density and infinitely variable thickness foam gives you the perfect cushioning for every part of the pad.