The Undyz Starter Pack
Please read!
Important: Undyz is engineered differently.
Our underwear is designed to give you a perfectly tailored fit.
Men's jean sizes are anywhere between 2-4 inches off from accuracy. Measure once (60 seconds). Perfect fit for life.
Undyz Sizing Chart
| Waist Inches | <32 | 32–35 | 35–37 | 37–41 | >42 | |
|---|---|---|---|---|---|---|
| Thigh Circumference | Waist Size | S | M | L | XL | 2XL |
| Slim | 18 | 20 | 22 | 24 | 26 | |
| (Regular) | 20 | 22 | 24 | 26 | 28 | |
| Plus | 22 | 24 | 26 | 28 | 30 |
Let customers speak for us
Really love my undyz!!! Great for playing sports or just sitting all day.. great for not sweating and stinking and super comfortable
I do a lot of hiking and hunting in extreme weather from 90f down to 10f. I have gone over 15 miles in one day. No adjustments, no chaffing. This is the only underwear I wear for any situation. 10/10. Buy them!
Best underwear I've ever worn. When you first put them on you will kind-of understand. But after a few hours you will 100% understand why everyones loves them. Already have recommended to my dad and friends
Wore a pair to a volleyball game and it was a game changer for sure!!! Had no chafing or folding in weird places.
These are the only thing my husband asked for for Christmas. He loves his Undyz and he says they’re the first pair of underwear that hasn’t made him chafe!
Saxx. ExOfficio. Cariloha. I've tried them all, and Undyz left them in the dust. The fit and fabric are simply leagues better than anything else on the market, and the interior walls are a revolutionary improvement on the pouches that other brands offer. I cannot recommend these boxers or this company enough!
Trusted by athletes • veterans • fathers | 5★ comfort | Patent-backed design
The real reason your underwear has never felt right
Most underwear fails where it matters most:
the inner thigh crease—the birthplace of sticking, chafing, sweat pockets, and mid-day adjustments.
Traditional designs focus on fabric… not actual male anatomy in motion.
That’s why comfort collapses long before your day ends.
Introducing the InnerWall System™
Dual-wall section that eliminates friction before it starts
- Prevents anatomy from collapsing into the thighs
- Ends sticking at chafing at the root
- Improves airflow and reduces heat buildup
- Supports natural movement without squeezing
- Stays in place all day-no ride-up, no adjusting
- Premium fabric that promotes skin health
- Quality stitching to eliminate irritation
Immediate Benefits You’ll Feel on Day One
No more peeling yourself off your leg
Even on long walks or hot days
No more public micro-fixes
Breathable modal blend
Stays put, never rides up
High-Thigh + Waist sizing accuracy
Underwear So Comfortable, You’ll Forget You’re Wearing It.
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Curved seams for enhanced comfort
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Extra room in the seat for better fit
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Moisture-wicking, breathable Modal fabric
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No-roll waistband & chafe-free stitching
Upgrade his drawer in with one-click
The Undyz Collection
Built Out of Necessity — Not Tradition
After years in the Marine Corps and long days building businesses, Alyxander was tired of underwear that stuck, chafed, rolled, squeezed, and forced constant adjusting.
Premium brands weren’t solving the real problem.
So he engineered a new internal architecture, tested prototypes obsessively, secured multiple utility patents, and built the underwear men actually needed.
