5.3oz, 89% Polyester, 11% Spandex Single Dyed Jersey. 40+ UV protection. Four-way stretch fabric. Rich, cotton-like feel. Stand up collar with reverse coil zipper. Debossed 'Spyder' neck tape. Back vent with mesh. Back reflective taping. Side vents. Iconic rubberized Spyder bug logo at back vent. Rubberized Spyder wordmark at right side.