Silk Keeps in Moisture
The beards and facial hair, you may have noticed, are drier to touch, and this is because the natural oils have a harder time traveling down the hair shaft compared to the hair on our heads, where the natural oils or sebum are distributed from the scalp down to the hair shaft.
Because of this, facial hairs and beards are coarser and drier, just as it is for curly-haired women and afro girlies.
This lack of moisture can result in dryness and roughness. And what would help in this case is going on with moisturizing treatments. But that would amount to nothing if you sleep on a cotton pillowcase or bedding.
Cotton has a rough surface texture that can tug and pull at the beard, especially with tossing and turning during sleep, stripping away moisture and causing dryness and roughness.
On the other hand, using a silk pillowcase changes the story. Silk pillowcases consist of tightly joined protein fibers that are uniformly packed, resulting in an incredibly smooth feel. When you sleep on it, there's minimal friction between the pillowcase and your beard.
This allows your moisturizing treatments to work effectively by retaining moisture. In this sense, you'll have to worry less about dryness, and hair breakage, and your beard will feel softer to the touch.