Protect the pillow core. In the past, pillows were made of cotton cloth or rice husk and packed in cloth bags, which were difficult to clean. If you have a pillow towel, you just need to clean it. Most of them are made of pure cotton yarn, and some of them are interwoven with acrylic yarn. There are two kinds of yarn-woven pillow towels and thread-woven pillow towels. There are jacquard, printing, jet jacquard, jacquard embroidery, velvet printing, velvet jacquard and plaid (anti-plaid) pillow towel, etc. The fabric is tight and firm, soft and elastic, and comfortable to use. Used to protect the pillowcase clean and tidy, but also decorative.