So lightweight, we call them Weightless! I had no idea what tri-blend fabric was until starting Nayked Apparel. My team sought to find the lightest, silkiest feeling fabric in the world. What we found was tri-blend fabric. It's typically a blend of 3 fabrics; polyester, cotton and rayon. When you combine these three fibers, 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 our collection of tri-blend t-shirts "Weightless". Our weightless tri-blend t-shirts show off YOU, with a bit of stretch in the fabric, and are highly 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.