💤 ZzzBrief #21 — The Pillow Flip Effect

There’s nothing quite like flipping your pillow to the cool side — that instant, refreshing sigh your body makes. It’s not just comfort. It’s chemistry.

Your skin has thermal sensors that tell your brain when it’s safe to release heat. When you cool your face and neck, your core temperature begins to drop, signaling to your brain that sleep can start.

In other words: that tiny flip actually triggers a biological “go” signal.

Core-temperature drops are one of the strongest predictors of deep sleep. Studies show that a cooler sleep environment (around 65°F) can increase restorative slow-wave sleep by up to 25%.

Simple cooling cues — like breathable pillowcases or a quick flip during the night — accelerate that process without expensive tech.

Before bed, place your pillowcase in the freezer for ten minutes (really). Pull it out right before lights-out and enjoy the first cool contact.

It’s oddly satisfying — and more effective than you’d expect.

Product: Cooling Pillowcase
Made with silver-infused fibers that stay cool and fight bacteria so every flip feels fresh.

Sleep smarter,
Bri

P.S. If you usually work out late — tell me: do you notice it affects your sleep? I might feature some replies next week.

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Disclaimer: I’m not a doctor — just sharing research and practical tips. Always talk with your healthcare provider before making big changes to your sleep or health routines. Some links I share may be affiliate links, which means I may earn a small commission if you purchase through them (at no extra cost to you).