Dark. Cool. Less friction.

Deeper rest is not a silk fairy tale. That is the whole brief.

Satin sleepwear keeps the body easy to wash and easy to wear. The mulberry silk pillowcase is the one fiber that is worth the science talk: it does not grab hair or drink your night cream the way cotton does. Blackout curtains and a mask do the rest.

• Dark room, on purpose. Light is the cheapest way to wreck a night.
• A cool, smooth pillow. Silk here. Satin is not the same thing.
• Clothes you forget you are wearing. The satin set, the kimono, the nightgown.

If you only buy one science piece, buy the pillowcase. If you only buy a set, buy satin you will actually wash.