How to Choose the Right Underwear for Your Workout Routine

Quick Answer

For most workouts, choose underwear made from moisture-wicking, breathable fabric like organic cotton blends with a bit of stretch. Look for a snug but not tight fit, and avoid seams that might chafe. The best underwear for gym sessions supports your body without shifting or bunching, so consider your activity and personal comfort.

When you're sweating through a workout, the last thing you want is underwear that rides up, chafes, or traps moisture. The right pair can make a big difference in comfort and confidence, whether you're lifting, running, or stretching. This guide breaks down what to look for in workout underwear and how to match it to your routine.

We'll cover fabric, fit, and style considerations, and we'll point out which features matter most for different activities. You'll also see how some ARQ basics can fit into your active wardrobe, even if they're not marketed as athletic wear.

Fabric Matters: Cotton vs. Synthetics

For exercise, you want fabric that breathes and wicks moisture away from your skin. Synthetic materials like polyester and nylon are popular for athletic underwear because they dry quickly and don't hold sweat. However, they can sometimes trap odor and may not feel as soft against sensitive skin.

Organic cotton is a great choice if you have sensitive skin or prefer a natural feel. It's breathable and soft, but it can absorb moisture and stay damp if you sweat heavily. A blend of cotton with a small amount of spandex (like 8-10%) offers the best of both: breathability and stretch that helps the underwear stay in place during movement.

• For high-intensity workouts or heavy sweating, prioritize moisture-wicking synthetics or quick-dry blends.
• For low-impact activities like yoga or Pilates, cotton or cotton blends are comfortable and breathable.
• If you have sensitive skin, look for organic cotton or seamless options to reduce irritation.

Fit: Snug but Not Restrictive

The best underwear for gym should fit snugly enough to stay put but not so tight that it leaves marks or restricts movement. A good test: you should be able to move freely without the underwear shifting, but you shouldn't feel compressed. Look for a waistband that sits comfortably without digging in.

Different styles offer different coverage and support. Briefs and hipsters provide more coverage and stay in place well, while thongs minimize visible lines but may not offer enough support for high-impact activities. Boyshorts can be comfortable but may ride up if they don't have enough leg grip.

• Try moving around in the fitting room—squat, lunge, and stretch—to see if the underwear stays put.
• If you're between sizes, size up for a more comfortable fit during exercise, especially in cotton styles that may shrink slightly.
• Prioritize the fit around your hips and rear to avoid bunching or wedgies.

Style Selection by Activity

Your workout type can guide your underwear choice. For running or high-impact cardio, you'll want underwear with a secure fit and minimal seams to reduce chafing. Seamless or laser-cut styles are good options. For weightlifting or strength training, you might prefer fuller coverage for comfort under shorts or leggings.

For yoga or Pilates, you'll want underwear that moves with you and doesn't bunch during twists and bends. A mid-rise or high-rise style can stay put during floor exercises. Remember that what works for one person may not work for another, so it's worth trying a few styles to see what feels best.

• Running: choose briefs or hipsters with a snug fit and flat seams.
• Yoga: opt for high-rise or mid-rise styles that stay in place during stretches.
• High-impact: consider seamless or laser-cut edges to prevent chafing.

Decision Rules for Choosing Workout Underwear

• If you sweat heavily: Choose moisture-wicking synthetics or quick-dry blends over pure cotton. Look for fabrics that pull sweat away from the skin to prevent chafing and discomfort. Opt for nylon or polyester blends for intense cardio sessions.
• If you have sensitive skin: Select organic cotton or seamless styles to minimize irritation. Avoid rough seams and tight elastic bands that can rub during movement. Try a cotton-spandex blend for softness and stretch.
• If you do low-impact activities: Comfortable cotton briefs or hipsters work well for yoga, Pilates, or light stretching. They offer breathability and enough coverage without unnecessary compression. Prioritize comfort and freedom of movement.
• If you do high-impact workouts: Prioritize a snug fit and flat seams to prevent shifting and chafing. Consider styles with a wider waistband for extra security. Look for briefs or hipsters with a secure fit.

ARQ Options for Your Workout

• FULL-COVERAGE BRA, black: The same details as our classic Wide-Strap Bra but with more fabric and a slightly different shape to accommodate for larger cup sizes. Signature bound edges. Pullover design. Best fits US cup sizes A through F. 92% organic cotton, 8% spandex. Many people size up from their usual size in this style. This bra offers support and coverage for workouts, with a cotton-spandex blend that stretches with you. The pullover design and bound edges reduce irritation, making it a good base layer under tank tops or tees.
• THICK SOCK, gym: Classic, unisex, everyday cotton crew sock. Soft, substantial, 3x1 rib knit construction with a comfy band at the top and a jersey knit heel and toe gusset. Knitted in North Carolina. Fits women’s shoe sizes 6-11. 83% Organic Cotton, 16% Nylon, 1% Spandex. While not underwear, this sock is designed for gym use with a cushioned feel and moisture management. Pair it with your workout gear for added comfort during exercise.

Fit Guidance

Best for

• Women with sensitive skin who prefer natural fibers for low-impact workouts
• Anyone doing moderate exercise like yoga, Pilates, or light cardio who values breathability

Not for

• High-intensity interval training or long runs where heavy sweating requires synthetic moisture-wicking fabrics
• Activities that involve a lot of bending and twisting, where a higher-rise style might be more secure

Choosing the right underwear for your workout is about balancing fabric, fit, and style to match your activity and comfort needs. Start with breathable, stretchy materials and a snug fit that moves with you. Test a few styles to find what works best, and remember that organic cotton options from ARQ can be a comfortable choice for lower-impact routines.