The Halsa Guides
Everything you need to know about sauna hats, sauna practice, and the science behind the ritual — written by the team that lives it.
Start Here
Our most-read guides, best if you're new to sauna hats.
The Complete Guide to Sauna Hats
Everything about wool sauna hats: why they work, how to choose one, care instructions, and the science behind heat protection. A single 3,000-word resource.
ComparisonBest Sauna Hats 2026
Our sauna hats ranked by category — best overall, best for long hair, best for cold plunge, best value. Real photos, real fits.
Sauna Hat Fundamentals
The basics every serious sauna-goer should know.
Choosing the Right Hat
Deep-dive comparisons and material breakdowns.
Sauna Science & Practice
The research behind the ritual — and how to get more out of every session.
Sauna Research Library →
A curated collection of 17 peer-reviewed studies, systematic reviews, and expert conversations on sauna and heat exposure — with honest context distinguishing observation from causation.
Sauna and Longevity: What the Research Actually Says
Do Biohackers Wear Sauna Hats? What Bryan Johnson, Huberman & Attia Actually Do
Do You Need a Sauna Hat in an Infrared Sauna?
Infrared vs Traditional Sauna: Do You Need a Hat for Both?
Sauna Hat vs No Hat: What Actually Happens to Your Hair
Sauna Hat for Long Hair: Full Protection Guide
Ready to shop?
Halsa hats are made from 100% wool; our Merino Wool Sauna Hat uses 100% Merino wool, and the Felt Sauna Hat 2-Pack is wool felt.
Shop All Sauna Hats