Pearl iZUMi Attack 3qtr Bib Tight (Medium Nylon-Spandex Spring/Summer 2014 Body: 88% nylon 12% spandex/ UPF 50+Weight: 250 g/m2Mesh: 80% polyester 20% Lycra A Pearl Izumi favorite, the ergonomically designed 8-panel Attack  Bib Tight delivers comfort, durability and a great fit.