The Gym Tee in Black from Knickerbocker, New York 

Details
Our Gym Heavyweight T-shirt is crafted from a custom-developed heavyweight jersey fabric. It's made with long staple, dual ring-spun and combed cotton yarn for durability and comfort. The T-shirt features flatlock seam construction and a mounted collar for a clean finish.

• 100% cotton, 10 oz jersey from Portugal.
• Made in Portugal.
• Wash on cold. Tumble dry low.