How to Choose the Right Underwear for Running and High-Impact Sports

Quick Answer

For running and high-impact sports, choose underwear made from breathable, moisture-wicking fabric like TENCEL™, with a secure fit that stays put without digging in. Prioritize full-coverage gussets to prevent chafing and consider styles like thongs or boxers depending on your activity and comfort. Our guide below breaks down the key decision rules.

When you're logging miles or hitting a high-intensity class, the last thing you want is underwear that rides up, chafes, or traps moisture. The right pair can make or break your workout, so it's worth thinking beyond the basics. This guide focuses on what actually matters for high-impact movement: fabric, fit, and coverage.

We'll walk you through concrete rules to apply when shopping, and highlight a few styles that work well for different activities. Whether you're a long-distance runner or a gym regular, these tips will help you pick underwear that supports your body and your performance.

Fabric: Prioritize Breathability and Moisture Management

The fabric against your skin is the first line of defense against discomfort. For running and high-impact sports, you need materials that wick sweat away and allow airflow. Natural fibers like TENCEL™, derived from trees, are known for their softness and breathability, making them a smart choice for athletic underwear. Avoid fabrics that trap heat and moisture, as they can lead to chafing and irritation.

Look for underwear that is labeled as breathable or moisture-wicking. The goal is to keep you dry and comfortable, whether you're on a long run or in a spin class. Remember, cotton can hold moisture, so reserve it for low-impact activities or lounging.

• Check the fabric content: TENCEL™ is a great option for breathability and softness.
• Avoid 100% cotton for high-impact workouts—it absorbs sweat and stays wet.
• Look for seamless or low-pressure seams to minimize friction.

Fit: Secure but Not Restrictive

A good athletic underwear fit should be snug enough to stay in place but not so tight that it digs into your skin or restricts movement. High-rise styles can offer extra coverage and a secure feel, especially if you're doing a lot of bending or stretching. Look for wide, flat waistbands that lie smoothly and don't roll down.

Pay attention to the leg openings. For running, you want underwear that doesn't ride up. Styles with a wider hip or longer leg can provide more stability. The right fit will feel like a second skin—you shouldn't have to adjust it mid-workout.

• Test the waistband: it should stay put without leaving marks.
• Choose a rise that matches your activity: high-rise for more coverage, mid-rise for versatility.
• Ensure the gusset is full-coverage to prevent shifting and chafing.

Coverage: Match the Style to Your Activity

Different activities call for different coverage levels. For running, many people prefer thongs because they eliminate visible panty lines and reduce the risk of wedgies. However, if you're doing yoga or lounging, a longer style like a boxer might be more comfortable. The key is to choose a style that you won't have to think about during your workout.

High-impact sports often involve a lot of movement, so you need underwear that moves with you. Consider the activity: running and HIIT might favor thongs or briefs with a secure fit, while lower-impact activities like Pilates allow for more variety. Ultimately, the best style is the one that makes you feel confident and comfortable.

• Thongs are great for running to avoid lines and wedgies.
• Boxers are ideal for activities that require more coverage, like yoga or lounging.
• Test different styles to see what works best for your body and activity.

Decision Rules for Choosing Athletic Underwear

• Rule 1: Fabric First: Always check the material. For running and high-impact sports, choose breathable, moisture-wicking fabrics like TENCEL™. Avoid cotton, which retains moisture and can cause chafing. Opt for TENCEL™ or similar breathable materials.
• Rule 2: Fit is Non-Negotiable: Your underwear should stay in place without digging in. Look for wide, flat waistbands and full-coverage gussets. Test the fit by moving around—if it shifts, it's not right. Prioritize a secure, comfortable fit that moves with you.
• Rule 3: Match Coverage to Activity: Consider the intensity and type of your workout. Thongs are great for running to avoid lines and wedgies, while boxers offer more coverage for yoga or lounging. Choose what makes you feel confident. Pick a style that suits your specific sport and comfort level.

Product Highlights for Your Workout

• thong-166947a667eac92be38c1088-1041330">Dipped Thong: This hybrid-rise thong sits high on the hips and dips low in the front & back for a flattering high-leg V-shape. The wider hip prevents digging in or slipping down, while the single-layer design and low-pressure seams make for an airy, barely-there feel. The wider hip and low-pressure seams are perfect for running—they stay in place without digging in, and the breathable single-layer design helps keep you cool.
• Long Boxer: The high rise, supportive front panel, and mid-thigh inseam offer comfort and coverage for lounging around, doing yoga, or running errands. No need for undies underneath—these are fully lined with our unique gusset extended down the inner leg. If you prefer more coverage for high-impact activities or want a versatile option for post-workout lounging, the Long Boxer provides frictionless comfort and eliminates the need for extra layers.

Fit Guidance for High-Impact Sports

Best For

• Thongs like the Dipped Thong: ideal for running and high-impact sports where you want minimal fabric and no visible lines.
• Long Boxer: perfect for activities that require more coverage, such as yoga, or for those who prefer extra fabric for comfort.

Not For

• If you dislike thongs, avoid them for running—choose a brief or boxer that offers full coverage without riding up.
• For very hot or sweaty workouts, avoid thick fabrics or styles with lots of seams that can cause chafing.

Choosing the right underwear for running and high-impact sports comes down to fabric, fit, and coverage. Prioritize breathable materials like TENCEL™, ensure a secure fit without digging, and pick a style that matches your activity. With these rules in mind, you can focus on your workout, not your underwear.