A pillowcase is used to cover a sleeping pillow and sometimes a decorative or bolster pillow. It’s normally a rectangular shape with an opening on one end where you insert the pillow. It is recommended that you change your pillowcase at least twice per week to protect your facial skin from breakouts or skin irritation.

Both linen and cotton make excellent bedding fabrics and share quite a few similarities — most notably their water-absorbent qualities and that refreshing, airy feeling. But there are quite a few differences as well, and being aware of them can make it easier for you to choose between the two.