Many blackout fabrics are not truly 100% blackout (usually only 75-90%) and, even worse, many are made with harmful chemicals that can contaminate air quality and worsen sleep. Sleepout fabric is truly 100% blackout. It's certified toxin-free and made without harmful substances. It blocks light, sound, and heat.

• Certified GREENGUARD Gold (screened for more than 15,000 VOCs known to pollute indoor air

• OEKO-Tex Class I: From yarn to finished product, every thread has been tested against a list of over 1,000 harmful substances

• PFAS Free: Produced without PFAS

• Phthalate Free: Produced without phthalates to contribute to healthy hormone & endocrine regulation

• Designed with an off-white backing to reflect light to prevent your bedroom from overheating, saving on energy costs

• Fully machine washable!

I’ve personally used their portable curtains in rentals for years now. The portable is also fairly easy to take when traveling, if you have space in your bag or car.

Have also used their rod curtains. Prefer the kind that have the “lip” over the top of the rod so that some light that leaks is additionally blocked.