Dri-FIT Knit fabric works to wick away sweat for a quick-drying material that helps you keep you to stay cool and comfortable and focused on your run Seamless construction moves smoothly against your skin Mesh panels offer zoned cooling Long length sits below the hip to help prevent the top from riding up during runs Thumbholes help keep the sleeve in place Reflective details for low-light runs Stay ahead of the pack with Nike's Dri-FIT Knit Long Sleeve Running Top. The premium running top combines seamless comfort, superb stay-put coverage and sweat-wicking fabric technology.