Wood has been considered as the best filling material for pillow cores since ancient times. Traditional Chinese medicine believes that wood, as the filling material of pillow core, can slowly exert its medicinal effect in people's long-term sleep, and can play a role in health care and even get rid of diseases.

Plant materials such as grains have always been considered as traditional filling materials, mainly because they are rich in amino acids, which can be partially absorbed by the human body through skin friction and breathing during sleep.

Modern pillow core materials mainly focus on the comfort of pillows.

There are three basic styles of pillowcases: ordinary one-piece bag type, Oxford cloth type (with flat edge) and hem type.

All three kinds of pillowcases have internal sealed fixed pillows, so there is no need to implement some reinforcement measures on both sides.

Cotton, cotton polyester and man-made fiber can be used to sew pillowcases, but the most comfortable pillowcase material is pure cotton fabric, which has good breathability and hygroscopicity and does not irritate the skin.