I used this shirt for part of my new t-shrit line for my etsy shop. I heat pressed it and it sealed perfectly! It's a very thin fabric, but surprisingly i don't have any issues with it being see through, which is usually an issue with white shirts. In my experience it runs a bit big but if you want a looser fit then it's perfect. (for instance, I wear a medium and this fits almost like a large)
My only "complaint" is that it is a little short, i think but it's not a deal breaker. ;)
Definitely will purchase again!