Should You Wear Underwear With Running Shorts? Expert Answer

Alright, let’s cut to the chase. When you’re gearing up for a run, the question of whether to rock underwear under your running shorts can feel like a surprisingly big deal. Some swear by going commando for that breezy freedom, while others insist on the trusty support of underwear to keep everything in place. At Shinesty, we get it — comfort and confidence are king when you’re pounding the pavement or hitting the trails. So, should you wear underwear with running shorts? We’re diving deep into the sweaty, stretchy, and downright personal world of running gear to give you the expert lowdown.

You Should Know

1. Running shorts often come with built-in liners designed to replace underwear. These liners provide support, wick moisture, and reduce chafing, making underwear optional depending on your shorts.
2. Wearing underwear under running shorts can sometimes cause discomfort or chafing. The extra layer can trap moisture and create friction, which is the last thing you want on a long run.
3. Choosing the right underwear matters. If you do wear underwear, opt for moisture-wicking, breathable fabrics like Shinesty’s Ball Hammock® collection to keep things dry, supported, and chafe-free.

Why Some Runners Skip Underwear With Running Shorts

Let’s talk liners. Most quality running shorts come equipped with a built-in liner that’s basically underwear’s athletic cousin. These liners are crafted from lightweight, breathable materials that hug your body just right, offering support without the bulk. They wick sweat away from your skin, which helps prevent that sticky, uncomfortable feeling that can ruin your stride.

Going commando inside your running shorts can feel liberating. Without an extra layer, you reduce the risk of fabric bunching or seams rubbing against sensitive areas. Plus, fewer layers mean less moisture trapped against your skin, which is a major win for avoiding chafing and irritation.

But here’s the kicker: not all running shorts are created equal. Some liners might not provide enough support for your personal comfort or anatomy, especially if you’re packing a bit more downstairs. That’s where underwear can step in to save the day.

When Underwear Makes Sense

If you find your running shorts’ liner lacking in support or if you’re running long distances where comfort is non-negotiable, slipping on a pair of performance underwear can be a game-changer. The right underwear will offer targeted support, keep everything in place, and wick moisture like a champ.

At Shinesty, we designed our men’s underwear with runners in mind. Our Ball Hammock® pouch technology cradles your goods in a breathable, moisture-wicking fabric that prevents chafing and keeps you cool mile after mile. So if you’re not feeling the built-in liner vibe, our underwear is the perfect backup plan.

Choosing the Right Underwear for Running

Not all underwear is created equal, especially when it comes to running. Cotton? Nope, it holds moisture like a sponge and will leave you feeling soggy and irritated. Instead, look for fabrics that breathe and dry fast.

Features to Look For

• Moisture-wicking fabrics: Materials like micro-modal or polyester blends pull sweat away from your skin to keep you dry.
• Seamless or flatlock seams: These reduce friction and prevent chafing during repetitive motion.
• Supportive pouch design: A well-designed pouch, like Shinesty’s Ball Hammock®, keeps everything in place without squishing or restricting.
• Breathability: Mesh panels or lightweight fabrics help air circulate and cool you down.

When you combine these features, you get underwear that feels like a second skin — perfect for running, working out, or just living your best life without distractions.

Frequently Asked Questions

Is it better to wear underwear or rely on the liner in running shorts?

It depends on your personal comfort and the quality of the liner. Many runners find the built-in liner sufficient, but if you need extra support or want to avoid chafing, moisture-wicking underwear like Shinesty’s Ball Hammock® collection is a smart choice.

Can wearing underwear under running shorts cause chafing?

Yes, especially if the underwear is made from cotton or has bulky seams. Choosing seamless, moisture-wicking underwear designed for athletic use helps prevent chafing.

What makes Shinesty’s underwear different for runners?

Our men’s underwear features the innovative Ball Hammock® pouch technology, which provides unmatched support and comfort. Plus, the moisture-wicking fabrics and chafe-resistant fit keep you cool and dry during any activity.

Are there running shorts without liners that require underwear?

Absolutely. Some running shorts are designed without liners, so wearing underwear is necessary for support and hygiene. In those cases, picking the right underwear is crucial.

How often should I replace running underwear?

Underwear that’s frequently exposed to sweat and movement should be replaced every 6-12 months to maintain optimal support and hygiene. Shinesty’s durable fabrics hold up well, but listen to your body and replace when you notice wear or loss of support.

Ready to Upgrade Your Running Comfort?

At Shinesty, we don’t just make underwear — we engineer comfort that moves with you. Our men’s underwear collection is designed to provide unparalleled comfort and support. Featuring the innovative Ball Hammock® pouch technology, these underwear offer moisture-wicking fabrics and a fit that prevents chafing, ensuring you stay cool and comfortable all day long.​ Whether you're seeking everyday essentials or bold, statement-making designs, Shinesty has you covered with a range of styles that combine performance with personality. Don’t settle for less when it comes to your running gear — Shop Now and experience the difference for yourself.