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Foundations · 8 min read

What is löyly — and why everything else is secondary

Löyly is the word Finns use for the burst of steam when water hits hot stones. It's also the word they use for the spirit of the sauna. Both meanings are intentional. This guide explains what löyly is, why it's the only metric that matters, and what to look for when you're evaluating any sauna.

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