ELITE Transfer fabric with In–R–Cool technology provides superior cooling, reflective sun protection and chlorine resistance ELITE Aero fabric is strategically placed for superior aerodynamics Direct–Vent back panel provides superior ventilation 12” zipper for venting Welded hem with silicone Two back easy access envelope pockets TRI quick–dry chamois 9 ” inseam (size medium)Body: 80% nylon 12% Black Lycra Spandex 8% polyester/ UPF 50+Technology: coldblackShoulder and Upper Back Panel: 80% polyester 20% elastane/ UPF 50+Back Mesh Panel: 82% polyester 18% elastane/ UPF 28+Form fitBody: 80% nylon 12% Black Lycra Spandex 8% polyester/ UPF 50+Technology: coldblackShoulder and Upper Back Panel: 80% polyester 20% elastane/ UPF 50+Back Mesh Panel: 82% polyester 18% elastane/ UPF 28+