warmth and comfort. designed with ergonomic flat seams and sweat-wicking fabric, the long-sleeve nike dri-fit knit half-zip women's running top offers lasting comfort in cooler conditions.. benefits. dri-fit fabric to wick away sweat and help keep you dry and comfortable. mock neck that zips up to the chin for warmth. flat seams move comfortably against your skin as you run. thumbholes at cuffs for an enhanced fit and warmth. mesh side and back panels for breathability. reflective loop at upper back for enhanced visibility and to help keep media-player cords out of the way. product details. ""run fast, live fearless"" print at interior back hem. fabric: body/upper back: dri-fit 56% polyester/44% nylon. back/side panels: dri-fit 54% polyester/46% nylon. center front/center back: dri-fit 52% nylon/48% polyester.. machine wash.