NIKE Men's Practice Overtime Full Zip up Jacket The Nike Practice OT Jacket is made from Dri-FIT polyester warm-knit material that is moisture-wicking to ensure that you are comfortable and dry during your workout. Featuring and old school look will allow you to look your best while training your hardest. Stay warm during these colder seasons with the Nike Practice OT Jacket Dri-Fit technology wicks moisture away from the skin for cool, dry wear 100% polyester plain warp-knit fabric