Be ready for anything with the Axis collection, a layering system of training gear for different conditions. A user guide (with levels from 0 to 3) lets you know how each piece fits into the ethos of your next workout. This Level 1 fitness top is designed to help you stay warm and comfortable thanks to a relaxed fit easily layers over your workout top. Nike Dri-FIT ADV technology combines moisture-wicking fabric with advanced engineering and features to help you stay dry and comfortable.