I wouldn’t say I travel frequently, but when I do, it’s a sure bet I’ll be out of town for a spell. One of my superpowers is packing just a carry-on for 3+ weeks (including international travel). And something that always makes it in, no matter the danger of my suitcase not closing? A silk or satin pillowcase.

It may seem a little weird, but if you don’t believe me, at least take it from Olivia Rodrigo, who inspired me to follow suit after I watched her “73 Questions” interview with Vogue. While the singer cites a fear of germs (“I’m a little bit of a germaphobe with hotels, so I always like to have my own pillowcase”), my reasoning is a little more…vain. My hair’s the type that goes wacky—like, Albert Einstein wacky—if I don’t have a silk or satin pillowcase.

Silk and satin help reduce friction, thereby eliminating much of the frizz experience. Ever since I bought my first satin pillowcase a few years ago, I haven’t looked back. It eliminates the need for me to re-style rumpled hair in the morning. And my hair thanks me when I’m on a long stint away from home. Below are my favorites that I’ve tried over the years. All of them are machine-washable, but air-drying is advised.

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