Ten Thousand redefines the training staple with the Interval Shirt, a technical powerhouse built to withstand the most punishing workouts in your rotation. Engineered with a high-stretch, lightweight fabric, this shirt provides uncompromised mobility whether you’re under a barbell or hitting the pavement for a long-distance haul. It is the ultimate piece of utility gear—clinically tested for durability and designed to stay cling-free, breathable, and distraction-free until the final rep.