Under Armour 1326413 Tech 2.0 Short Sleeve T-Shirt Steel Light Heather 5XL The original go-to performance tee just keeps getting better: lighter, more breathable, more powerful, and has a new body design for even better movement. Made of polyester. Tech 2.0 fabric has more advanced moisture-wicking for fast evaporation and cooling. Antimicrobial odor control properties maintain freshness. 4-way stretch. Crewneck. Short raglan sleeves. Stealth reflective Under Armour logo on left chest. Loose fit. Tagless.