The On Men's Core-T Shirt goes back to basics with a lightweight design built for everyday running and training. Crafted from recycled polyester with added stretch, it delivers breathable comfort that moves with you through every mile. Its simple single color construction makes it easy to style and pair with any piece in your wardrobe. Designed for year-round wear, this tee performs in warm or cool conditions without slowing you down. A true running essential, it balances timeless style with reliable performance for the long run. | On Men's Core T-Shirt