I had no idea what tri-blend was until starting Nayked Apparel. My team sought to find the lightest, silkiest feeling fabric in the world. What we found was tri-blend. It's typically a blend of 3 fabrics; polyester, cotton and rayon. When you mash these fabrics together, you get a lightweight, silky hand feel tee that drapes over your body like you're wearing nothing at all. This is why we call ours weightless. Our weightless shirts show off you with a bit of stretch in the fabric and are wrinkle resistant. The polyester in this blend keeps you dry for all night partying. These might be the sexiest tees we sell. Try them on and tell me what you think.