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.
NEXT-LEVEL VERSATILITY
Our commitment to perfection isn’t just about looks — it runs thread-deep. We scour the earth, searching for the finest premium materials, durable finishes, technical treatments, and advanced construction techniques to build products on an unbreakable foundation of functionality and longevity.
ONE FOR ALL
The Interval Shirt is the training top you’ll reach for no matter the workout. Its streamlined build and versatile performance let it transition from lifting to conditioning to endurance without missing a beat. One shirt, ready for everything in your training program.
ULTRA-COMFORTABLE FABRIC
Lightweight, breathable, and flexible, the Interval Shirt was built for superior range of motion. The fabric stretches and recovers with ease, so you can train without distraction. From burpees to sprints, it stays locked in on your body while letting you move at full capacity. Finished with our permanent Odorblock™ treatment, it’ll keep you fresh session after session.
PERFECT FIT
Engineered with a tailored athletic cut, the Interval Shirt stays close to the body without clinging or restricting. It’s designed to move with you, maintaining a sharp silhouette through every rep and step. No excess. No drag. Just a dialed-in fit that feels as good as it looks.
BUILT TO LAST
Durability isn’t optional — it’s essential. The Interval Shirt is made with high-quality performance fabric that resists pilling, fading, and wear from the grind of daily training. No matter how often you put it to the test, it’s built to hold up session after session.
ATHLETE-LED DESIGN
The Interval Shirt was built side-by-side with serious athletes who put it through the toughest workouts imaginable. Every detail, from the pocket placement to the liner fit, was shaped by their feedback and refined through countless rounds of wear testing. The result is a shirt proven under pressure, designed to perform at the highest level of training.