Introducing the perfect lightweight zip-up. The Max Effort is made of a flexible polyester fabric for total comfort, with woven fabric at the shoulder panels and chin guard for edgy contrasts. Features like underarm gussets, thumbholes at the sleeve openings and a wicking and anti-odor finish will make this zip-up your favorite layer. We also added reflective accents in key areas to make sure you're good to go for night workouts, too. Final Sale, No Returns Max Effort 1/4 Zip Pullover