Blanket stay exactly right temperature

Man invent blanket that try very hard to keep human at nice sleeping temperature all night. Not too hot. Not too cold. Just the kind of warm where your foot stop doing little search mission for cool corner.

Some of these blankets use phase change material. This means tiny hidden stuff inside can absorb extra heat, store it, then release it later when you cool down. Man not trust many buzzword, but this one at least doing a job.

The basic cave logic is beautiful. When human become roast potato, blanket takes some heat away. When human become sad cold lizard at 3 a.m., blanket gives some back. Very fair trade.

A lot of modern sleep tech very dramatic. App. Score. Tracking. Dashboard. But a blanket that quietly minds the temperature for you? That feels more like progress and less like homework.

Brain respect any invention whose whole purpose is 'you deserve better sleep.' This is noble engineering. Build fewer pop-up ad. Build more correct blanket.