Sauna Theory
About

Sauna is good for you. Except for one thing.

We build gear for men who refuse to choose between short-term health and their long-term future.

Rotterdam · 2023 — today
Our timeline

From problem to product.

2023

The problem

Two founders going through IVF. Advised to stop saunaing. Nobody stops their sauna.

2024

The prototype

First samples with a freezable pack in a textile engineering lab. 47 iterations on the pouch alone.

2025

The test

Independent validation with intra-scrotal temperature measurement. Result: 95°F maintained for 30 minutes.

2026

The product

Sauna Theory launches in the Dutch market. First 10,000 pairs sold within 6 months.

Our principles

Three rules.
The rest follows.

01

Evidence over promises

Every claim is tied to peer-reviewed research or our own validated tests.

02

Comfort is non-negotiable

A healthy product that's uncomfortable doesn't get worn. We don't accept compromise.

03

Fair prices

No middlemen, no retail markup. Direct-to-consumer, built to last.

Contact

Questions? Email us directly.

There are four of us. We usually reply within 24 hours.

hello@saunatheory.com View FAQ