black sauna short lying on sauna bench

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The blindspot in your sauna protocol

Saunas are one of the most well-evidenced longevity tools available. Regular use is linked to lower cardiovascular mortality, reduced inflammation, and improved recovery. That's why Bryan Johnson, Andrew Huberman, and a generation of biohackers have made it a daily ritual.

But there's a cost most men don't think about...

  • 2-4°C

    Testes need to be 2-4°C below core temp to operate optimally

  • 14%

    Every 1°C above the threshold reduces sperm production by 14%

  • 50%+

    A single, unprotected sauna session can drop motile sperm count by more than 50%

ProtoCold sauna shorts are engineered specifically to keep scrotal temperature at optimal levels using BPA-free cooling packs and 100% cotton shorts to reduce exposure to toxins.

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Why is ProtoCold different?

  • BPA-free, reusable cooling pack

    Non-toxic, freezable gel pack sits securely in the purpose-built pocket, maintaining cooling for up to 45 minutes per session.

  • 100% cotton

    No synthetic materials against your skin at high temperatures. Just breathable, natural cotton built for the heat.

  • Ready in under an hour

    Freeze, use, repeat. Each cooling pack re-freezes in less than 60 minutes, so it's ready for your next session without the wait.
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black sauna shorts with gel pack

Protocold Cooling Sauna Shorts

Sauna smart. Protect what matters.

Cooling sauna shorts engineered to keep your testicles at optimal temperature - all the benefits of heat without sacrificing your fertility.

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How it Works

Step 1:

Freeze

Chill your gel pack: Pop your ProtoCold gel. pack in the freezer for a minimum of 2 hours before your session.

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black sauna short lying on sauna bench

Step 2:

Insert

Suit up: Slide the gel pack into the built-in cooling pouch of your ProtoCold shorts.

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Step 3:

Sauna

Go in. Stay longer. Step into the sauna and let the heat do its work. While your core temperature rises and the longevity benefits stack up, the gel pack keeps scrotal temperature in the safe zone.