The Insider 3 Bib Shorts are made with both airiness and comfort in mind. Made with mesh side panels and bib straps, along with a light gusset, they'll allow the maximum amount of air to flow when it's hot or you're working hard.
Meanwhile, Castelli's most versatile, performance seat pad will feel soft on a trainer or outdoor bike, while breathable mesh grippers work with the straps to keep the leg endings firmly in place, so you'll barely register their presence as you ride.