Columbia Zero T Shirt Mens. Columbia Zero T Shirt MensConquer the great outdoors with the Zero T Shirt from Columbia. Crafted with short sleeves and a crew neckline, this lightweight tee is designed to help keep you cool, comfortable, and focused on the task at hand. Design features inbuilt UPF 30, allowing for more carefree hours in the sun.> T shirt> Short sleeves> Crew neck> Stretch fit> UPF 30 sun protection> Omni-freeze zero technology> Sweat activated cooling> 100% polyester> Machine wash