To understand how the déjà pillowcase works to combat acne, take a look at some of the things that build up over days on a traditional pillowcase:

• oil from skin and hair
• hair products
• makeup
• lotions and skin creams
• dust
• dirt 
• bacteria

By making it easy to have essentially a fresh, clean pillowcase every night, the déjà pillowcase gives skin the best possible environment to rest and heal, rather than clogging pores or making it harder to protect itself. The 100% cotton fabric wicks moisture away, rather than trapping it on the skin and promoting bacteria growth.

The déjà pillowcase is especially effective for side sleepers, who are more exposed to the buildup on the surface of the pillow. For back sleepers, the déjà pillowcase still makes a difference, as it is difficult to completely avoid skin contact with the fabric which has been touching hair.