The Flagship
BluBallz Cooling Boxer Brief
Premium materials. Advanced cooling technology. Engineered support where it matters. Confidence down to the details.
Cooling fabric
Pulls heat and moisture away.
Breathable mesh
Ventilation where it counts.
Engineered support
A stay-put, all-day fit.
Premium materials
Soft, durable and built to perform.
Available sizes
Planned lengths
No payment today. Expected launch: Holiday 2027.
Fit & Size Guide
Supportive, athletic fit.
| Size | Waist (in) | Waist (cm) |
|---|---|---|
| S | 28–30 | 71–76 |
| M | 31–33 | 79–84 |
| L | 34–36 | 86–91 |
| XL | 37–39 | 94–99 |
| XXL | 40–42 | 102–107 |
Between sizes? We recommend sizing up for the most comfortable fit.
Fit Finder
Find your size in 5 seconds.
Built Different
BluBallz vs. regular underwear
BluBallz
Cooling fabric
Breathable mesh
Engineered pouch
Premium finish
Regular underwear
Traps heat
Minimal airflow
Flimsy support
Basic materials
Cooling Performance
Moisture out. Cool air in.
A breathable mesh structure helps move moisture away from the skin while opening clear paths for airflow. The result is a drier, cooler feel during long days and hard workouts.
More comfort. More days.
Built for the weekly rotation.
Multiple colors and designs are planned for the first collection, led by our signature black, blue and charcoal gray.
Colorway preview
True blue. Zero blue balls.
Ice blue with black contrast stitching. For the days black feels too serious.
Colorway preview
Gray area? Not down there.
Charcoal gray with blue contrast stitching. The one that goes with everything.
The Weekly Rotation
Five days. Five pairs. Zero sweat.
One for every workday: two black, two charcoal gray and one blue. Planned alongside singles and the 3-pack.