ALPHX Trunks – Supportive, No-Chafe, Bulk-Free Comfort - ALPHX.com

ALPHX Men’s Trunks – Modern & Athletic Fit Underwear

Two Fits. One Mission: Better Comfort.

Whether you're after a classic snug fit or need more room for muscular thighs, ALPHX Trunks deliver breathable comfort, no ride-up, and sleek performance—all day long.

Find Your Fit: Modern or Athletic

  • Modern Fit Trunks: Snug, supportive, and streamlined. Ideal for lean to average builds with a low-rise waistband and close silhouette.
  • Athletic Fit Trunks: Built for stronger thighs with wider leg openings and extra stretch to eliminate ride-up or chafing.

Common Features, Premium Feel

  • Breathable cotton–modal–elastane fabric
  • Contoured pouch for natural support
  • Stay-put waistband and legs
  • Flatlock stitching to prevent irritation

Trunks That Work as Hard as You Do

From office hours to workouts, ALPHX Trunks stay comfortable, supportive, and stylish—whatever your build or routine.

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FAQs – ALPHX Trunks

What makes ALPHX Trunks different from other men’s underwear?

ALPHX Trunks offer the support of a brief with additional leg coverage. Our Trunks feature a sleek 2-inch inseam, providing a modern, supportive fit without excess fabric. Designed to prevent ride-up, chafing, and bulk, they offer all-day comfort, making them perfect for active and everyday wear.

Do ALPHX Trunks ride up?

No! ALPHX Trunks are designed with a no-ride-up fit to stay in place all day. The combination of premium fabric with 6% elastane and an ergonomic cut ensures they move with you—no constant adjustments needed.

Do ALPHX Trunks work under slim or tailored pants?

Yes! The smooth, bulk-free design of ALPHX Trunks makes them perfect for wearing under slim-fit jeans, dress pants, or tailored suits. No bunching, no visible lines—just a clean, sleek look.

Are ALPHX Trunks good for working out?

Absolutely! ALPHX Trunks provide the perfect balance of support and flexibility, making them ideal for workouts, running, or any active lifestyle. Plus our 2 inch inseam (size medium) make them ideal to wear under your favorite gym shorts. Additionally the breathable fabric wicks moisture to keep you cool and dry.

What sizes do ALPHX Trunks come in?

ALPHX Trunks are available in 6 waist sizes: XS-XXL and two leg cuts: Modern for guys with slim to average thighs and Athletic for guys with larger or muscular thighs. Check out our Size Charts to find your perfect fit.