The Interval Shirt is the gold standard for training shirts. It’s built to move fast, breathe easy, and handle every workout without compromise. Constructed from lightweight, sweat-wicking fabric with high-stretch mobility, the Interval Shirt is equally at home in max-effort conditioning, tough strength days, and miles on the road. Bonded seams and a streamlined fit ensure comfort that never distracts. This is the shirt built to push the limits. Light and breathable performance fabric Cling-free, sweat-wicking, and quick-drying Permanent Odorblock™ treatment Anti-chafe flatlock seams Durability tested to resist 20,000+ abrasions and 100+ PSI 3M Easy Care for durability Materials & Care - 84% Polyester / 16% Spandex / 144 GSM Care Instructions Machine wash cold with like colors Tumble dry low Do not iron Do not dry clean Do not bleach