The Aviator - Lyocell Boxer Brief
‣ Materials
Constructed from 95% premium certified lyocell, a fabric sourced from sustainably managed wood, to offer an exceptionally soft touch, outstanding breathability, and natural moisture-wicking abilities to keep you fresh, comfortable and confident all day.
Sitting down for many hours demands freedom where you want it, which is why we've added 5% elastane to give you that perfect stretch.
‣ Product care
For lasting performance and reduced environmental impact, we recommend washing at a cooler setting (40℃) with an eco - certified detergent. Skip the tumble dryer - air drying will help maintain the fabric’s integrity and softness over time.
Bonus tip: For ultimate fabric protection and extended durability, we recommend using our premium wash bag. It helps prevent friction, maintains the integrity of the fibers, and keeps your boxer briefs in top condition
- wash after wash.
Choose options
Testimonials
"Incredibly comfortable. Big plus that there’s no care label. They don’t ride up like most other underwear I’ve tried. The waistband is slightly slimmer than I’m used to, but not in a negative way.
I’ve walked, flown, stood, and even trained in them — 5 out of 5!"
- Douglas, First Officer, Sweden
"First flight tested on Madeira — known as one of the more challenging airports. I can happily report it went smoothly, so if they can handle Madeira, they can handle anything. Super comfortable all day."
- Fredrik, Airline Captain, Sweden
"The quality feels really good — you can tell right away. I’m looking forward to trying them during work in the cockpit. Great job!"
- Per Munk Gellert, First Officer, Denmark
“My free sample boxer short from 1st LAYERS performed extremely well on my 8-hour flight to New York — no itching, no sweating, just perfect.”
- Espen Poulsen, Captain and Instructor
I’m super satisfied with the boxers — the fabric, the fit, and especially the tag-free design.
As a former athlete who played football at the highest level, I can strongly recommend them for athletes as well.
I’ll definitely be buying more. Great job on the brand!
- Richard Nilsen, Flight Instructor & Former Professional Football Player, Norway
our fabric
Lyocell
Lyocell is a fiber derived from sustainably sourced wood, where natural cellulose is transformed into a fabric known for its silky smoothness, exceptional breathability, and moisture-regulating properties — born from the precision of nature itself.
- Feels like nothing. Changes everything.
Aviator collection
Designed with pilots
We asked high performing individuals who sit for hours, moves with purpose, and doesn’t tolerate distractions, what they want from their first layers.
They shared their pain points and frustrations from using well known brands around the globe.
And we listened...
what's next?
We’re building a system of intelligent base layers.
Future drops will include new cuts, layers, and materials — always guided by feedback from our community.