CrossFit isn’t just a workout—it’s a test of endurance, strength, and mental grit. But even the toughest athletes can’t perform at their best if their gear isn’t up to par. Let’s talk about the unsung hero of your gym bag: underpants. The right pair can mean the difference between crushing your WOD (Workout of the Day) and battling constant adjustments, chafing, or discomfort.
In 2025, advancements in fabric technology and ergonomic design have revolutionized men’s athletic underwear. This guide breaks down what to look for, why it matters, and how to choose the best underpants for CrossFit. Plus, we’ll spotlight a top-tier option that’s changing the game.
When selecting underwear for high-intensity CrossFit sessions, prioritize innovations like moisture-wicking fabrics that keep you dry during AMRAPs and anti-chafing seam technology for burpee-to-box-jump transitions. The best men's CrossFit underwear now features 4D ergonomic pouches for unrestricted squat mobility and diamond-grid ventilation to combat swampy conditions.
For those dialing in their gear strategy, our comprehensive guide analyzes how 2025’s compression ratios (7-15 mmHg) enhance blood flow during heavy cleans while maintaining anatomical alignment in handstand push-ups. Durability matters too – look for cross-stitched stress points where Olympic lifts and rope climbs demand reinforcement.
Our Products
Try RMAC Today!
If you're interested in experiencing the comfort and style of RMAC underwear, visit our store to explore our collection and take advantage of our Best Fit Quiz to find your perfect fit.
Why Your CrossFit Underpants Matter
CrossFit combines weightlifting, gymnastics, and high-intensity cardio—all of which demand gear that moves with you. Traditional cotton underwear absorbs sweat, leading to moisture buildup, chafing, and distractions. Moisture-wicking, supportive, and breathable fabrics are non-negotiable for:
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Temperature regulation during explosive movements like burpees or box jumps.
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Reduced friction to prevent inner-thigh irritation during sprints or rope climbs.
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Secure support for heavy lifting sessions (no one wants to adjust mid-deadlift).
Key Features to Look For in 2025
1. Moisture-Wicking Fabrics
CrossFit’s intensity means sweat is inevitable. Look for materials like:
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Modal: Naturally breathable and soft, with superior moisture-wicking properties.
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Nylon/Spandex blends: Lightweight, durable, and quick-drying.
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Merino wool: Odor-resistant and temperature-regulating (ideal for long sessions).
2. Anatomic Support Systems
A secure pouch design prevents “bounce” during dynamic movements. The Real Pouch System (offered by RMAC) uses tailored sizing (A-D) to cradle without constricting.
3. Seamless or Flatlock Stitching
Raised seams can rub raw during repetitive motions. Flatlock stitching lies flat, reducing irritation risk.
4. Breathability
Mesh panels or laser-cut ventilation zones enhance airflow.
5. Durability
CrossFit’s rigors demand underwear that withstands daily washes. Reinforced waistbands and anti-pilling fabrics are key.
Best Men’s Underpants for CrossFit Training in 2025
RMAC - Best Underpants for Hot Weather in 2025
Modal 7in Boxer Briefs No Fly 6pk Black/Dark Gray/Navy
Description (Modal 7in Boxer Briefs No Fly 6pk Black/Dark Gray/Navy):
Features:
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Tailored Pouch Sizes: Discover unmatched comfort and support with four customizable pouch sizes (A, B, C, D) designed just for you.
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Moisture-Wicking Modal: Our expertly crafted modal fabric whisks away moisture effortlessly, keeping you cool and dry in any situation.
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Sturdy Waistband: Enjoy the peace of mind that comes with a no-roll waistband, securing fit regardless of your movements.
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Irritation-Free Design: Say goodbye to annoying tags with our tagless design that enhances your comfort.
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Unrestricted Flexibility: With a blend of nylon and spandex, these briefs adapt to your every move, providing all-day comfort without chafing.
Description:
Gentlemen, elevate your underwear experience with our Real Men Boxer Briefs—crafted to embrace your assets with divine comfort. Choose from four tailored pouch sizes (A, B, C, D) that offer a bespoke fit and redefine traditional underwear standards. Why settle for the ordinary when you can pamper your crown jewels with the luxury they truly deserve? Upgrade to a life of freedom and comfort—it's time to let your confidence soar!
Product Care:
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Composition: 92% Modal, 8% Spandex
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Machine wash cold
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Gentle cycle
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Avoid bleach
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Tumble dry on low
Discover Also:
-Nylon Seamless 7in Boxer Briefs No Fly 3pk Black/Heather Gray/Slate Green
-Nylon 9in Boxer Briefs V-FLY 3pk Black
-Modal 7in Boxer Briefs No Fly 3pk Black/Blue/Gray
-Modal 7in Boxer Briefs V-FLY 3pk Black/Cyan/Gray
-Modal 3in Boxer Briefs No Fly 3pk Heather Gray/Slate Gray/White
-Click here to see more Boxer Briefs
Nylon 0in Sport Briefs No Fly 4pk Blue/Gray/Dark Blue/Dark Gray
Description (Nylon 0in Sport Briefs No Fly 4pk Blue/Gray/Dark Blue/Dark Gray):
Features:
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Custom Fit: Experience a personalized fit with our sport briefs, available in four pouch sizes (A, B, C, D) to perfectly suit your body’s contours.
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Moisture-Wicking: Designed with moisture-wicking fabric, these briefs ensure you stay cool, dry, and fresh throughout the day.
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No-Roll Waistband: Enjoy the convenience of a medium-rise waistband that remains securely in place, preventing any rolling or bunching for optimal comfort.
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Flexible Support: Crafted from stretchy materials, these briefs provide the ideal combination of support and flexibility to move with you during any activity.
Description:
Ladies and gents, get ready to rev up your comfort with Real Men Sport Briefs, engineered to elevate your daily wear to a whole new level. Offering four pouch sizes (A, B, C, D), these briefs are tailored like a trusted pit crew, ensuring your prized possession is both supported and comfortable. Slip into unmatched comfort and performance—winning the Daytona 500 of comfort with each wear. Say goodbye to mundane underwear and hello to a whole new kind of champion-level comfort.
Product Details
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Material: Composed of 90% nylon and 10% spandex for ultimate comfort and durability.
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Care Instructions: Machine wash cold, use a gentle cycle, avoid bleach, and tumble dry on low for long-lasting wear.
Discover Also:
-Modal 0in Briefs No Fly 3pk Blue/Gunmetal Gray/Heather Gray
-Modal 0in Briefs No Fly 3pk Pink/Purple/Turquoise
-Click here to see more Briefs
Nylon 0in Low-Rise Bikini Briefs No Fly 3pk Black/Gray/White
Description (Nylon 0in Low-Rise Bikini Briefs No Fly 3pk Black/Gray/White):
Key Features:
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Tailored Fit: Choose from four customized pouch sizes (A, B, C, D), ensuring personalized support and comfort tailored to your needs.
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Breathable Fabric: Crafted from lightweight nylon fabric, these briefs efficiently wick away moisture, keeping you cool and dry all day long.
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Secure Waistband: Featuring a no-roll, low-rise waistband, these briefs promise a secure fit that won't roll or dig into your skin.
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Tag-Free Comfort: Say goodbye to irritation with our tagless design, enhancing your comfort experience.
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Flexible Movement: The combination of ice silk nylon and spandex allows freedom of movement, preventing chafing or riding up, so you can move effortlessly.
Product Care Instructions:
Material Composition: 90% Nylon, 10% Spandex
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Machine wash in cold water
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Use a gentle cycle
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Avoid bleach
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Lay flat to dry
Discover Also:
-Modal 0in Bikini Briefs No Fly 3pk Black/Blue/Gray
-Modal 0in Low-Rise Bikini Briefs No Fly 3pk Emerald/Purple/Red
-Modal 0in Bikini Briefs No Fly 1pk Black
-Nylon 0in Mesh Bikini Briefs No Fly 3pk Black/Blue/Gray
-Click here to see more Bikini Briefs
Nylon 0in Strapless Jocks No Fly 3pk Red/Green/Purple
Description (Nylon 0in Strapless Jocks No Fly 3pk Red/Green/Purple):
Features:
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Strapless Innovation: Enjoy unparalleled freedom and ease of movement with a strapless design that provides essential support without the cumbersome bulk of traditional jockstraps.
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Breathable Performance Fabric: Crafted from a lightweight, moisture-wicking nylon-spandex blend, this fabric keeps you cool and dry throughout any activity.
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Secure No-Roll Waistband: Experience all-day comfort with a waistband that stays securely in place, eliminating the need for constant adjustments.
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Flexible Comfort: The stretchy fabric moves seamlessly with you, offering flexibility while preventing chafing or irritation for ultimate comfort.
Description:
Get ready for a game-changer, gentlemen! Introducing the Real Men Strapless Jocks - redefining comfort and support without the hassle of straps. Slip into these jocks to experience the blissful feeling of having your assets comfortably supported, liberating you from the confines of traditional jocks. Say goodbye to outdated styles and hello to freedom!
Product Details
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Material Composition: 90% Nylon, 10% Spandex
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Care Instructions:
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Machine wash cold with like colors
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Avoid bleach
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Tumble dry on low
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Cool iron if needed
Discover Also:
-Nylon 0in Strapless Jocks No Fly 1pk Gunmetal Gray
-Nylon 0in Strapless Jocks No Fly 1pk Cyan
-Nylon 0in Strapless Jocks No Fly 1pk Red
-Nylon 0in Strapless Jocks No Fly 1pk Purple
-Click here to more Jocks
Discover our best Leggings
Under Armour Tech 6-Inch Boxerjock
Known for its quick-drying and moisture-wicking fabric, this boxerjock offers a snug fit that prevents riding up during intense workouts.
Saxx Kinetic Boxer Briefs
Featuring the patented BallPark Pouch, these boxer briefs provide excellent support and reduce chafing, making them ideal for dynamic movements in CrossFit.
Nike Pro Compression Shorts
Designed with a compressive fit and Dri-FIT technology, these shorts offer muscle support and keep you dry throughout your training sessions.
Reebok Performance Boxer Briefs
Crafted with a breathable mesh fabric, these boxer briefs ensure ventilation and comfort during high-intensity workouts.
Gymshark Men's Boxers
Featuring ultra-soft fabrics and stay-put waistbands, these boxers reduce uncomfortable bunching under workout clothes, enhancing comfort during CrossFit sessions.
How to Choose the Right Fit
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Snug but Not Tight: Compression should support without restricting blood flow.
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Inseam Length: 7–9 inches prevents thigh chafing during squats or lunges.
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Try Before You Buy: Use RMAC’s Best Fit Quiz to find your perfect pouch size.
Care Tips for Longevity
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Wash in cold water to preserve elasticity.
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Avoid fabric softeners—they clog moisture-wicking fibers.
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Air-dry when possible to prevent shrinkage.
Try RMAC Today!
If you're interested in experiencing the comfort and style of RMAC underwear, visit our store to explore our collection and take advantage of our Best Fit Quiz to find your perfect fit.
