Sit lower in the sauna, keep sessions to 15 minutes or less, cool down fully between rounds, stay hydrated, and wear breathable, loose-fitting underwear made from natural fibers. These habits let you enjoy the heat without trapping excess warmth in the one area that benefits from staying cooler.
The whole appeal of a sauna is the heat. Your cardiovascular system responds to it. Your muscles loosen. Your stress drops. But your body isn't uniform, and one area, down where it matters, is designed to run cooler than the rest of you. A good sauna habit works with that, not against it.
Position and timing make a bigger difference than most men realize
Heat rises. The top bench in a traditional Finnish sauna can run 20 to 30 degrees hotter than the floor. If you're new to sauna or trying to manage heat more carefully, sitting on the lower bench is the simplest adjustment you can make. Pair that with shorter rounds.
Research on sauna and reproductive health found that two 15-minute sessions per week over three months raised scrotal temperature measurably and affected sperm parameters.[1] Duration and frequency are the variables that matter, and both are easy to manage. Whole-body heat is good for men, so the practical move is to take the heat and keep the testicles cooler while you do it.
- Session length: 10 to 15 minutes per round is a reasonable ceiling for most men.
- Cool-down time: Give yourself at least as long outside the sauna as you spent inside. A cold shower or cool air works. This is where your body resets.
- Rounds: Two to three rounds with full cool-downs is a common structure. More rounds without cooling just accumulates heat.
- Frequency: Regular sauna use is associated with meaningful cardiovascular benefits, with more frequent sessions linked to lower rates of fatal cardiac events in a large Finnish cohort.[2] The goal is consistency, not extremes.
Hydration is the part people skip
You lose fluid fast in a sauna. Dehydration raises your core temperature, which makes the heat harder to manage everywhere. Drink water before you go in, not just after. A rough guide: 500ml before, water available between rounds, and enough after to replace what you sweated out. Electrolytes matter if you're doing longer or more frequent sessions.
What you wear into the sauna matters more than the towel you sit on
Most men wear whatever they grabbed from the drawer. Tight synthetic underwear traps heat and holds moisture against the skin, which is the opposite of what the cool zone needs. Loose, breathable natural or naturally derived fibers move air and wick moisture. The difference in surface temperature between a breathable natural fiber and a synthetic isn't trivial when you're already in a hot room.[3]
| Variable | Better choice | Why it helps |
|---|---|---|
| Bench position | Lower bench | Cooler air, less radiant heat |
| Session length | 10 to 15 minutes | Limits cumulative heat load |
| Cool-down | Full reset between rounds | Lets core and surface temp drop |
| Underwear fit | Loose, not compressive | Allows airflow around the cool zone |
| Underwear fabric | Natural or naturally derived fiber | Breathes and wicks better than synthetics |
Oakman launches Fall 2026. Founding members get first access and founding pricing locked in. Reserve your spot.
Where Oakman fits into the ritual
Oakman is built specifically for active men looking for scrotal cooling all day and want the option of a cold pack for cooling in the sauna or after heat exposure. The fabric is TENCEL MicroModal, naturally derived from wood pulp rather than plastic, blended with ROICA V550, a clean Japanese stretch fiber, rather than conventional spandex. The fit is athletic with a gusset, an extra panel that gives the testicles room and airflow. Dyes are bluesign approved, so what touches your skin is controlled all the way through the supply chain. Briefs are available individually and in a 3-pack. Oakman launches Fall 2026, and the Founding 100 get first access.
Related reading
Frequently asked questions
Does sauna use affect sperm health?
Research shows that repeated sauna exposure raises scrotal temperature and has been linked to temporary reductions in sperm count and motility.[1] The effect appears reversible when sauna use stops, but duration and frequency are real variables worth managing if this is a concern.
How long should you stay in a sauna per session?
Most guidelines and research protocols use 10 to 15 minutes per round as a practical ceiling. Cooling down fully between rounds matters as much as the time inside. See our guide on how long it's safe to stay in a sauna for more detail.
Does what you wear in a sauna make a difference for heat management?
Yes. Tight synthetic fabrics trap heat and hold moisture against the skin, which adds to the heat load in the area that benefits from staying cooler. Loose, breathable natural or naturally derived fibers allow more airflow and wick moisture more effectively.[3]
How much water should you drink around a sauna session?
Dehydration raises core temperature and makes heat harder to manage. Drinking around 500ml before a session and replacing fluids between rounds and after is a reasonable baseline. Our guide on sauna hydration covers this in more depth.
Is regular sauna use actually good for you?
A large prospective study of Finnish men found that more frequent sauna bathing was associated with substantially lower rates of fatal cardiovascular events.[2] The benefits are real, and managing heat sensibly during sessions lets you use it consistently. More on the evidence at what are the health benefits of regular sauna use.
This article is for general educational purposes and is not medical advice. If you have specific concerns about fertility or your health, talk to a qualified clinician.
References
- Garolla A, et al.. (2013). Seminal and molecular evidence that sauna exposure affects human spermatogenesis. Human Reproduction. [Link]
- Laukkanen T, Khan H, Zaccardi F, Laukkanen JA. (2015). Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events. JAMA Internal Medicine. [Link]
- Comparative Assessment of Sensory Comfort Properties Across Eco-Friendly Textile Materials for Apparel. 2025. Journal of Natural Fibers (Taylor & Francis). [Link]
