It belongs to a towel in knitting, a shearing towel. 330G is hard to say, because the shear degree is different, there are 1.5 times and 2 times shear.

And the f number will not affect the gram weight. For example, the overall weight and thickness of 150D/72F and 150D/36F are the same. The f number indicates how many filaments there are. 72F consists of 72 filaments, and the thickness of 150D is better than that of 36F.

Now dyeing is basically reactive dyeing.

Ordinary towel machines can't do it. Ordinary towel machines can only make polar fleece with a height of 1.9 to 2.9. Velvet and coral velvet are other towel machines. 330 grams is about 32S/ 1+ 150D.