Interval Muscle Tee shirts or pushing through a sweat-soaked

or pushing through a sweat-soaked session

weather-resistant stretch canvas and refined with field-tested details

this is the elevated essential you’ll reach for every single day

Lightweight and ultra-breathable

Interval Muscle Tee shirts or pushing through a sweat-soakedThe Interval Shirt is the gold standard for training shirts. Its 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.