Material Science / Thermal Engineering / California
BUILT FOR MEN WHO BUILD THEMSELVES.
The first athletic boxer brief engineered for men who prioritize fertility, health, and performance.
Be Early on ThisHeat builds the body. But it compromises what matters most. We engineered a way to protect it.
OAKMAN
Ice where it counts
A custom reusable cold pack slides into a hidden pocket. Published research supports scrotal cooling for healthy sperm production and quality. We made it wearable.
Cotton traps what your body is trying to release
In a sauna, your skin is pushing out toxins through sweat. Cotton absorbs that sweat and holds it against you. TENCEL fibers do the opposite. It wicks moisture away from the body and releases it.
Built to breathe, not trap
Most boxer briefs create a heat pocket against the body. Ours use an open-knit TENCEL construction that allows airflow where it matters most. You'll feel the difference in the first hour.
Join the Founding 100
Launching Summer 2026. The first TENCEL sauna boxer brief with a built-in cold pack pocket. Founding members get first access and locked-in pricing.
Early access / Founding member pricing / No spam

