I thought this was 48% polyester, since it’s a ‘heather’, and listed as a 3001cvc. It’s is only 1% polyester, so my project didn’t work. (This is my fault for not reading the fine print, but it’s not that easy to find the info online, so I’m sharing it here.) That being said, it’s actually a very soft shirt, and a really nice color...just make sure you need a mostly cotton shirt.