What to Actually Bring to the Sauna
There's a moment, usually about three or four visits in, when you stop being someone who occasionally uses the sauna and start being someone who goes. It's rarely a decision. You just notice you've started planning your week around it.
That's also the moment you realise you've been doing it slightly wrong. You've been carrying one damp towel, drinking nothing, and sitting on a bench that a stranger's back was against ten minutes ago.
None of this is complicated. But almost nobody tells you, because sauna culture assumes you grew up with it. Here's what regular sauna-goers actually carry, roughly in the order that people get it wrong.
Two towels, not one
This is the most common mistake, and it's the easiest to fix.
You need one towel to sit on and one towel to dry with. If you use the same towel for both, you spend the walk back to the changing room drying yourself with something that has been under you in a hot room for twenty minutes.
The sitting towel isn't just about comfort. In most Nordic and Baltic saunas it's basic etiquette — you sit on your own towel so that sweat doesn't go into the wood. In Germany it's not optional; you'll be told. Even where nobody enforces it, the benches last longer and everyone's happier.
Linen or a thin cotton weave dries faster than a thick bath towel and takes up less bag space. A thick fluffy towel in a sauna bag is a mistake you make once.
Something on your head
This is the one people skip, and it's the one that costs you.
Heat rises, so the air around your head is the hottest air in the room — often 20 to 30 degrees hotter than at bench level. Hair is mostly keratin, and keratin begins breaking down somewhere around 70°C (158°F). In a room running at 80–90°C (176–194°F), your hair is sitting well past that threshold, for far longer than any blow-dry or straightener would.
The damage is slow and cumulative, which is exactly why people don't connect it to the sauna. It shows up months later as dryness and breakage, and gets blamed on shampoo.
Wool is the traditional answer, and it's traditional because it works — it's one of the slowest natural fibres at transferring heat, so a dense wool hat keeps your scalp meaningfully cooler than the surrounding air. Dense felted merino also stays comfortable when damp and resists odour in a way ordinary felt doesn't. This is the thing we make, so read that with the appropriate scepticism — but the physics predates us by a few centuries.
The Saunelle merino sauna hat →
A word of warning if you're improvising: a cotton cap or a beanie is worse than nothing. Cotton holds water, water conducts heat far better than air, and you end up with a hot wet compress on your head.
Water, and ideally salt
You will lose somewhere between half a litre and a litre of sweat in a decent session. Most people replace it afterwards, badly, with a glass of water and no thought.
Bring a bottle and drink between rounds rather than only at the end. If you're doing three or more rounds, or you're a heavy sweater, plain water alone can leave you feeling flat and headachy — you've lost sodium along with the fluid. A pinch of salt in your water, an electrolyte tab, or simply eating something salty afterwards handles it.
Glass and metal bottles get dangerously hot in a sauna. Leave the bottle outside the room.
Sandals
Public sauna floors, plunge pool surrounds, and changing room tiles are the three places athlete's foot spreads most efficiently. Simple rubber sandals solve it entirely.
They also mean you can walk straight from the hot room to the cold plunge or outside without thinking about wet floors, which matters more than it sounds when you're doing four rounds.
A way to tell the time — but don't obey it
Most saunas have a clock or a sand timer. If yours doesn't, a cheap analogue watch you don't mind heating up is fine. Leave the smartwatch and the phone outside; heat is bad for batteries and screens, and a phone in a sauna is a social offence in most of the world.
The reason to track time at all is that heat distorts your sense of it. Ten minutes can feel like three, or like twenty. But the clock is a reference, not an instruction. The actual rule is to leave when your body says so, not when you hit a number someone told you.
For afterwards
A wide-tooth comb, if you have long hair — wet hair is at its most fragile and a fine brush pulls it apart.
Something for your skin. Sauna heat and cold water strip oils; a simple moisturiser or facial oil after your last round makes a noticeable difference over a winter of regular sessions.
A dry base layer to change into. If you're walking home in November after a proper session, you'll cool down much faster than you expect.
What to leave out
Jewellery. Metal conducts heat and rings, earrings and necklaces can burn. Take them off in the changing room, not in the hot room when you notice.
Your phone. Beyond the etiquette, heat genuinely damages lithium batteries and screen adhesive.
Strong fragrance. You're sharing a small enclosed space with people whose senses are heightened. Whatever you're wearing will be much stronger in there than you think.
Anything you'd be upset to see warped. Plastic bottles, sunglasses, contact lens cases. Heat finds them.
The actual list
If you want it as something to check before you leave the house:
- Sitting towel
- Drying towel
- Wool sauna hat
- Water bottle, with electrolytes or salt if you're going long
- Sandals
- Wide-tooth comb
- Moisturiser or facial oil
- Dry layer for afterwards
Eight things. Most of them you already own.
The hat is the one people leave until last, usually because the ones they've seen look ridiculous, and then they wonder why their hair has changed. It was the reason we started making these — not because the world needed another sauna accessory, but because every option was something you'd hide at the bottom of your bag.
Made for the ritual.