Castellis core tri top has been engineered to create a piece of sportswear that optimises performance while also offering complete comfort for athletes crafted from castellis innovative tempo3 lightweight stretch fabric the sleek blue design of the core features a ykk half zip to the front an in built kiss3 tri seat pad and speed hooks to prevent the top from riding up during the swim and bike phases of the triathlon the tops high capacity aero free pocket construction is finished with s