We use Yupoong for our customers both beanie and knit style hats. The fit great, customers love them and they take htv very well as long as you know what you're doing!
I bought these for sublimating, I have yet to sublimate on them, however, they are quite nice. The white is a nice crisp white, the fit is perfect for both adults and children. When fully stretched, it bounced right back to its original size, which is a plus for us because I will be sublimating for both adults and children.
I used HTV on these and they are sized just right. In the past the "one size fits most" line was very arguable. Not the case with these hats. They keep their stretch for a great deal of time and when they get a bit loose, give them a wash to bring back that stretch!
These hats are really cute. They took HTV very well and held their shape. If you tend to wear a smaller hat size they are perfect but I wear a larger hat size and it seems a little small but still looks cute. I would recommend.