The Kozy journal · all things warmth

Koziology.

Notes on warmth, sleep and Korea. Short, useful pieces on the things we keep being asked: why a cool room and a warm bed beat a warm room, what far infrared actually does, what older cultures knew about warmth before anyone measured it. One or two a month.

3 notes · by Team Kozy Start reading ↓
01 · Sleep

Cool air above, warmth below: the Korean way to sleep better.

The best bedroom is a cool one. That advice is everywhere, and it is half right. The other half is the part Korea worked out three thousand years ago: keep the air cool and warm the place where the body lies.

By Team Kozy · September 2026 · 6 min read Read the note →
02 · Warmth

Far-infrared vs electric blanket: what is actually different.

Both plug in. Both make a bed warm. Past that, they are different machines doing different things to your body, and the difference is easiest to notice at two in the morning.

By Team Kozy · September 2026 · 6 min read Read the note →
03 · Korea & Japan

Waon therapy: what Japan learned about gentle, whole-body warmth.

A Japanese cardiologist spent thirty years showing that mild warmth, repeated, does something intense heat does not. The idea has a name, and it is worth knowing even if you never set foot in a sauna.

By Team Kozy · September 2026 · 5 min read Read the note →

Next, when it's ready: how the body regulates its own temperature with age, why Korean mothers spend the weeks after birth warm, and what a Paris winter does to a bed. One letter a month tells you when.

One letter a month. Nothing more.

New notes, what we're making in Seoul, the occasional batch date. No discounts, because we don't run them.

Litual — the topperPoom — the wrap · €159