Core OS Tee
All measurements in inches
S — 28.75" Length / 24.75" Width
M — 29.5" Length / 26.375" Width
L — 30.25" Length / 28" Width
XL — 31.5" Length / 29.875" Width
2XL — 32.5" Length / 31.875" Width
Oversized fit — size down for a tighter fit.
Built for real training. Made for everyday wear.
The Core OS Tee delivers a clean oversized fit with a premium heavyweight feel.
Made from 100% organic combed ring-spun cotton, it combines durability, comfort, and a minimal aesthetic that works in and out of the gym.
— Oversized / boxy fit with dropped shoulders
— Heavyweight premium cotton (200 GSM)
— Soft yet durable feel
— Clean, minimal design
— Built for training & lifestyle
Runs oversized — size down for a more fitted look.
Fast US shipping (5–8 business days)
All orders are processed quickly and shipped with reliable carriers. Tracking is provided as soon as your order ships.
14-Day Returns
Not satisfied? No problem.
You can request a return within 14 days of delivery.
Contact us and we’ll take care of the rest.
✔ Easy returns
✔ Hassle-free process