Engineered for Sauna. Designed for Life.
Cooling performance underwear for men, engineered with an integrated CryoInsert pocket for sauna sessions, recovery, and everyday performance. The complete sauna system.
Pre-Order the Complete KitBuilt to Work Together
Meet the Performance Boxer
Every detail engineered around one number: the 2 to 4 degrees Fahrenheit below core body temperature where sperm develop best. Everything else follows from that.
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01
Made of TENCEL Lyocell
A highly breathable, buttery soft, non-toxic fabric made from natural, raw material wood sourced responsibly from managed forests in Austria.
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02
Engineered For Every Situation
Boxer made for all uses - daily wear, high performance activity, and built to withstand high heat environments like sauna.
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03
Integrated Pouch for the CryoInsert
Built in pouch to hold the Cryoinsert - A BPA-free cooling ice pack to actively lower scrotal temperature during your sauna sessions.
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OEKO-TEX Standard 100 Certified
Independently tested and certified free from harmful substances and dyes.
The Complete Sauna System
Heat for your heart, your recovery, and your head. Cold for the one place the research says to keep it. Four products, one job.
The Performance Boxer
Engineered with TENCEL Lyocell fabric, an ultrasoft and breathable fabric made from sustainably sourced wood in Austria. Designed for comfortable daily wear, performance training, your sauna recovery, and everywhere in between.
- Naturally sweat wicking and odor resistant
- No microplastics or harmful dyes - OEKO-TEX Standard 100 Certified. No polyester or nylon.
- Dries roughly 40% faster than cotton
The CryoInsert
The engine of the system. Research links elevated scrotal temperature to reduced sperm quality and hormonal output. The CryoInsert exists to push that temperature back where it belongs, for up to 15 minutes at 200 degrees Fahrenheit.
- Stays cool up to 15 minutes at 200 degrees
- Non-toxic, BPA Free, TPU material for safe contact
The Vault
The solution for keeping your CryoInsert cold from home to your sauna destination.
- Built in ice packs on both sides of The Vault
- Place your frozen CryoInsert inside of The Vault for up to 2 hours of temperature control.
- Perfect size to fit up to 3 CryoInserts inside.
The Sauna Hat
Your best kept secret for staying in the sauna longer.
- Protect your hair and scalp from the high heat.
- Provide a cooling barrier between the heat and your brain.
- Made of 100% Merino Wool sourced from Australia.
