How to Choose the Right Underwear for Your Workout

Quick Answer

For your workout, choose underwear made from moisture-wicking, breathable fabrics with a seamless, no-show design that stays in place during movement. Avoid cotton and opt for styles that match your activity level, whether that's high-waisted coverage for yoga or a thong for running.

Choosing the right underwear for your workout is about more than just comfort—it can affect your performance and confidence. The wrong pair can cause chafing, bunching, or visible lines, distracting you from your exercise. This guide will help you pick the best underwear for exercise based on fabric, style, and fit.

Whether you're hitting the gym, going for a run, or practicing yoga, your underwear should work as hard as you do. We'll break down the key features to look for, from moisture-wicking materials to seamless construction, and offer practical tips for different types of workouts.

Why Fabric Matters for Workout Underwear

The fabric of your underwear is the most critical factor when it comes to staying comfortable during a workout. Moisture-wicking underwear is designed to pull sweat away from your skin, helping you stay dry and preventing irritation. Look for synthetic materials like nylon, polyester, or spandex, which are known for their moisture-wicking properties and breathability.

Cotton, on the other hand, absorbs sweat and stays wet, which can lead to chafing and discomfort. While cotton is breathable, it's not ideal for high-intensity activities. For low-impact exercises like yoga or Pilates, you might get away with cotton, but for running or cycling, choose a synthetic blend that offers stretch and support.

• Check the label for moisture-wicking fabrics like nylon or polyester.
• Avoid cotton for high-sweat activities.
• Look for breathable mesh panels for extra ventilation.

Seamless vs. Seamed: What's Best for Active Wear?

Seamless underwear is a top choice for workouts because it eliminates the risk of chafing and visible panty lines. The smooth, no-show finish of seamless styles makes them ideal for wearing under leggings or tight workout bottoms. You can move freely without worrying about seams digging into your skin or showing through your clothes.

Seamed underwear, while offering more structure, can sometimes cause irritation during repetitive movements like running or cycling. If you prefer a seamed style, look for flatlock seams that lie flat against the skin. However, for most workout routines, seamless underwear provides the best combination of comfort and invisibility.

• Seamless styles are perfect for leggings and tight-fitting workout gear.
• If you choose seamed underwear, ensure the seams are flat and smooth.
• Consider seamless for high-movement activities like running or HIIT.

Finding the Right Style for Your Workout

The style of underwear you choose should match the type of exercise you do. For activities that involve a lot of bending and stretching, like yoga or weightlifting, a high-waisted style offers coverage and stays in place. High-waisted underwear also provides a smoothing effect under high-waisted leggings, creating a sleek silhouette.

For running or cycling, a thong might be more comfortable as it eliminates the risk of wedgies and allows for maximum freedom of movement. However, some people prefer more coverage for modesty or comfort. Ultimately, the best workout underwear is one that you forget you're wearing because it fits well and doesn't shift around.

• High-waisted styles are great for yoga, Pilates, and weightlifting.
• Thongs work well for running, cycling, and high-intensity workouts.
• Choose a style that matches your comfort level and the demands of your activity.

Fit and Support: Key Considerations

Proper fit is essential for workout underwear. It should be snug but not too tight, with enough stretch to move with your body. Look for a waistband that stays in place without digging into your skin. Leg openings should not ride up or cause friction. If you're between sizes, consider sizing up for a more comfortable fit during exercise.

Support is another factor, especially for high-impact activities. Some underwear styles offer additional support through compression or higher waistbands, which can help you feel secure. However, support needs vary by individual and activity. Pay attention to how the underwear feels during movement and adjust your choice accordingly.

• Ensure the waistband sits comfortably without pinching.
• Check that leg openings don't ride up.
• Try moving in the underwear before committing to a long workout.

Decision Rules for Choosing Workout Underwear

• Fabric: Moisture-Wicking is a Must: Choose underwear made from synthetic materials like nylon or polyester that wick sweat away from your skin. Avoid cotton for high-intensity workouts as it retains moisture and can cause chafing. Check the label for moisture-wicking fabrics before buying.
• Seamless for No-Show Comfort: Opt for seamless underwear to prevent chafing and visible lines under tight workout clothes. Seamless styles are especially beneficial for activities with lots of movement. If you wear leggings, seamless is the way to go.
• Style: Match to Activity: For yoga or weightlifting, consider high-waisted coverage. For running or cycling, a thong may be more comfortable. Choose a style that stays in place and feels good during your specific workout. Think about your workout routine and pick accordingly.

Product Recommendations

• High-Waisted Retro Bikini - Slate Grey (Final Sale): Classic meets modern comfort. This high-waisted bikini offers full coverage with a smooth, no-show finish — no visible lines, ever. Designed to disappear under everything (yes, even leggings), it’s the pair you’ll reach for day after day. Comfort that feels effortless. The seamless, no-show design makes it ideal for wearing under leggings or tight workout bottoms, providing coverage and comfort without visible lines.
• High-Waisted Thong - Blue Cloud (Final Sale): The thong that changes everything. Designed for comfort and confidence, this high-waisted style delivers a barely-there feel in ultra-soft, breathable fabric. With a smooth, seamless finish, it disappears under any outfit — even leggings — so you can look sleek and feel effortless. For workouts where you prefer minimal coverage, this thong offers a barely-there feel with breathable fabric, making it a good choice for running or cycling.

Fit Guidance

Best For

• High-intensity workouts like running, HIIT, or cycling where moisture-wicking and minimal coverage are key.
• Yoga, Pilates, or weightlifting where high-waisted, seamless styles provide coverage and stay in place.

Not For

• Swimming or water sports – these require specialized swimwear, not regular underwear.
• Those who prefer cotton for everyday comfort – but for workouts, synthetic blends are better.

Choosing the right underwear for your workout doesn't have to be complicated. Focus on moisture-wicking fabrics, seamless construction, and a style that fits your activity. With the right pair, you'll stay comfortable and confident, letting you focus on your fitness goals.