A sauna towel absorbs a full session of sweat, so it gets washed after every visit. That cadence is exactly why care matters: wash a towel two hundred times a year the wrong way and you'll feel it. The good news is the right way is mostly about what not to add.

The one rule: no fabric softener

Softener works by coating fibers in a waxy film. On a towel, that film fills the very pockets that do the absorbing. A few months of softener and a waffle towel starts repelling water instead of drinking it, and trapped residue is where stale smells live. Skip dryer sheets for the same reason. This single habit does more for a towel's lifespan than everything else combined.

The routine

• Wash after every session. Not every few sessions. It has done a hot room's worth of work.
• Go hot. 100% cotton takes a 140°F (60°C) wash, and that's the temperature that actually deals with what a towel picks up in a sauna. Check the label on anything blended.
• Detergent, nothing else. A normal dose. More detergent doesn't mean cleaner; it means residue.
• Line dry when you can, tumble low when you can't. A waffle weave air-dries fast, which is half the reason to own one.

If it has stopped absorbing

Inherited softener damage or detergent buildup has a fix: run it hot with a cup of white vinegar and no detergent, then once more with nothing at all. The film rinses out and the absorbency comes back.

Between rounds, at the sauna

Hang it. A towel folded on a bench between rounds stews in its own moisture; hung, a waffle towel is noticeably drier by the next round. It's why The Sauna Towel has a sewn-in loop.

Two notes for a new towel

Wash it once before first use. And expect it to get more absorbent over the first few washes; cotton blooms as the fibers relax. A towel that lasts is a habit, not a product feature, though it helps to start with the right construction: the material ranking covers that. Your hat asks for the opposite treatment, by the way: spot clean, never soak.