Dotsume/High-density jersey fabric is an extra-thick material of approximately 11.5 ounces, made of American cotton and knitted by loop-wheel knitting machine. As it is knitted very slowly, each knitting machine can only produce about 30 pcs for T-shirts per day, but it is characterized by its ability to evenly pack the yarn and its resistance to shrinkage and distortion even after repeated wear and washing. It has the advantages of being non-transparent and sweat stains are less noticeable, and its firmness makes it less likely to cling to the skin, making it comfortable to wear. The sewing is the covered sewing used in sweatshirts and the front and back W gusset specification seen in vintage sweatshirts.