Interval Shirt

in Charcoal


An all-purpose athletic shirt with just the right touch of tech

Ten Thousand’s mission is to distill athletic apparel down to its core, resulting in intelligently designed training essentials for committed athletes. They designed every detail of the Interval Shirt with the athlete in mind, making for a shirt that’s just as dedicated to your training regimen as you are.


  • Sweat-wicking, quick-dry Italian ribbed jersey fabric that balances breathability and comfort
  • Treated with a permanent silver-ion finish that blocks the growth of odor-causing bacteria
  • Raglan sleeves for a greater range of motion in the sleeve
  • Flatlock seams for chafe-free comfort
  • Available in standard and tall fits
  • Made in USA


  • Ribbed jersey


  • The Foundation Shirt is designed to hit about 1” below the waistline
  • If you are taller than 6’ 0”, or prefer a shirt that hits further below the waistline, consider the longer shirt for the right fit
Size Chest
S 36” - 38”
M 39 - 41”
L 42 - 43”
XL 44” +

Chest measurements refer to wearer’s chest, not the garment itself.

Final Sale

This item is not eligible for return or exchange

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