Silk Guide

Fresh keratin-treated hair needs low-friction sleep, gentle positioning and careful product timing. Here is how to protect the result overnight.

The best silk pillowcase for hot sleepers is a smooth 100% mulberry silk case that feels cool to the touch, fits properly, washes easily, and supports a lower-friction sleep routine.

A silk pillowcase should not make hair greasy by itself, but oil, skincare and product buildup can transfer to any pillowcase if it is not washed often enough.

Silk pillowcases can take up some moisture, but they are not usually the main reason skincare disappears overnight. Application timing, product texture, pillowcase cleanliness and fabric choice all matter.

Zipper and envelope silk pillowcases can both work well, but the best closure depends on pillow fit, sleep style, washing habits and how much hardware you want near delicate silk.

If you use skincare, face oil or hair oil at night, a silk pillowcase needs gentle but regular washing. Here is the safest routine for keeping mulberry silk smooth, clean...