ALPHX Men’s Underwear – Tailored Fit, Elevated Comfort - ALPHX.com

Collection: ALPHX Men’s Underwear – Tailored Fit, Elevated Comfort

ALPHX men’s underwear is engineered for real bodies—not one-size-fits-all sizing.

Shop our complete underwear collection, including briefs, trunks, and boxer briefs, available in Modern Fit and Athletic Fit to match different leg and body types. Each style is crafted with premium cotton-modal stretch fabric, a supportive contoured pouch, and a no-roll waistband—designed to move naturally with your body all day.

Whether you prefer a streamlined fit or extra room through the thigh, ALPHX delivers breathable comfort, clean silhouettes, and engineered support without excess fabric or ride-up.

Men’s Underwear—Engineered for Real Bodies

ALPHX designs men’s underwear with fit-first engineering—not one-size-fits-all sizing. Our full collection includes briefs (Modern Fit),as well as trunks, and boxer briefs—available in Modern and Athletic Fits.—so you can choose the fit that matches your body and how you like your underwear to feel.

Two Fits. One Premium Fabric.

Modern Fit – Streamlined fit for lean and average builds
Athletic Fit – Extra room in the thigh for muscular legs
Same waistband pouch and fabric for both fits
The difference is in the fit—not sizing up or down.
Designed to move naturally with your body.

Built for Everyday Comfort

Soft cotton–modal–elastane stretch fabric
Flatlock seams to reduce chafing
Supportive contoured pouch
No-roll waistband—no pinching
All Day comfort

Modern Fit and Athletic Fit use the same premium materials—only the fit changes.

Not sure which fit is right for you? Take our Fit Quiz to discover your perfect match.

FAQs ALPHX Underwear

What makes ALPHX underwear different?

ALPHX underwear is engineered for the perfect fit, offering two exclusive leg widths—Modern for slim to average thighs and Athletic for muscular legs. Allowing you to pair your waist size with your leg fit creates a more personal fit and therefore a better fit. This ensures superior comfort without compromise.

What styles of underwear does ALPHX offer?

We offer premium briefs, trunks, boxer briefs, and lounge pants, all crafted from a soft, breathable, and eco-friendly blend of cotton and modal for all-day comfort.

How do I find my perfect ALPHX fit?

Check out our Fit Guide to find your best size and fit in ALPHX Underwear.

Do you offer free shipping?

Yes! We offer free U.S. shipping on all orders above $75.00 and we ship for $5.00 on orders below $75 so you can enjoy premium comfort without a lot of extra costs.

Can I get a discount on my first order?

Yes! New customers who sign up to receive our newsletter will receive 20% off their first order—We promise not to inundate your inbox and you can cancel at any time.