Scientifically speaking, Yoshirt tees are made of a lightweight polyester. (30/1 to specific!)
It's luxuriously thin and incredibly soft. And does it look good? You bet it does.
Here's some info about the rest of the products we are offer:
Our women's leggings are 88% poly/12% spandex.
Stash Sacks and Tote Bags are canvas.