What Underwear To Wear Under Activewear? Ultimate Guide
Written by Bill M.Published on July 10, 2025Alright, let’s get real for a second. You’ve got your sleek leggings, your moisture-wicking shorts, and your high-performance tops all lined up for your workout. But what about the unsung hero of your activewear ensemble — the underwear? Yeah, that’s right. The right underwear can make or break your entire sweat session. We’re talking comfort, support, and zero chafing, all while keeping you feeling fresh and confident. So buckle up, because Shinesty is about to drop the ultimate guide on what underwear to wear under activewear. Spoiler alert: it’s not just about going commando or grabbing whatever’s clean. We’ve got the lowdown on fabrics, fits, and features that will have you crushing your workout and your style game simultaneously.
You Should Know
Before you dive into the nitty-gritty, here are the three most important facts you absolutely need to keep in mind when choosing underwear for your activewear:
- Fabric Matters More Than You Think: Breathability and moisture-wicking are your best friends. Look for fabrics like micro-modal, nylon blends, or performance mesh that keep sweat at bay and prevent that dreaded swamp crotch.
- Seamless or No-Seam is the Way to Be: Nothing kills your vibe faster than visible panty lines or chafing seams. Seamless underwear or those with flatlock stitching are designed to disappear under your leggings or shorts, giving you a smooth silhouette and zero irritation.
- Support and Fit Are Non-Negotiable: Whether you’re rocking the Ball Hammock® pouch for men or cheeky cuts for women, the right fit means your bits stay exactly where they should — supported, comfortable, and ready to move with you.
Choosing the Perfect Fabric for Activewear Underwear
Let’s talk fabric because this is where most people get it wrong. Cotton might be your go-to for everyday wear, but under activewear? It’s a no-go. Cotton soaks up sweat like a sponge, leaving you feeling damp and uncomfortable. Instead, Shinesty’s underwear collection features micro-modal fabrics that are outrageously soft, breathable, and moisture-wicking. This means you stay dry and comfy, even during the sweatiest HIIT sessions.
Micro-modal is a game-changer because it’s lightweight and has a silky feel that hugs your skin without suffocating it. Plus, it’s naturally breathable, so you avoid that sticky, sweaty feeling that ruins your workout mojo. For men, our Ball Hammock® pouch underwear uses this fabric to provide targeted support and ventilation, while our women’s cheeky cuts offer the perfect blend of coverage and freedom.
Another fabric to consider is nylon blends with spandex. These bad boys stretch with you, maintain their shape, and wick moisture away like pros. They’re perfect for high-intensity workouts where you need your underwear to keep up without bunching or riding up.
Why Seamless Underwear is a Must-Have
Seams are the enemy when it comes to activewear underwear. They dig in, cause chafing, and create those dreaded panty lines that ruin your sleek look. Shinesty’s seamless underwear is designed to vanish under your leggings and shorts, giving you a smooth, no-show finish that feels like a second skin.
Flatlock stitching is another feature to look for. It lays flat against your skin, reducing friction and irritation. Whether you’re running, cycling, or just crushing your yoga flow, seamless and flatlock-stitched underwear keeps you comfortable and confident.
Support and Fit: The Shinesty Difference
Support isn’t just for your sports bra. Your underwear needs to have your back (and front) too. For men, Shinesty’s Ball Hammock® pouch underwear is a revolutionary design that cradles your boys in a breathable, supportive pouch that prevents bounce and discomfort. It’s like a personal cheer squad for your junk.
For women, our cheeky cuts are designed to provide just the right amount of coverage and lift, so you feel sexy and supported without sacrificing comfort. Plus, our matching his-and-hers sets mean couples can get in on the fun with coordinated, performance-ready underwear that looks as good as it feels.
Fit is king. Underwear that’s too tight will dig in and cause chafing, while underwear that’s too loose will bunch up and ride around. Shinesty’s range is designed with a zero-BS comfort guarantee, so you get the perfect fit every time — no awkward adjustments mid-workout required.
Tips for Wearing Underwear Under Different Types of Activewear
Not all activewear is created equal, so your underwear game needs to adapt accordingly. Here’s how to match your undies to your outfit:
- Leggings: Go seamless or no-show with a micro-modal or nylon blend. Avoid thick waistbands that create bulges.
- Shorts: Opt for breathable, moisture-wicking briefs or boyshorts that stay put and prevent chafing.
- Compression Gear: Choose snug-fitting underwear with flatlock seams to avoid irritation and maintain support.
- Loose-Fitting Tops and Bottoms: You have more flexibility here, but still prioritize moisture-wicking and comfort.
Frequently Asked Questions
What makes Shinesty’s micro-modal fabric special for activewear underwear?
Our micro-modal fabric is insanely soft, breathable, and moisture-wicking, making it perfect for keeping you dry and comfortable during any workout. It’s lightweight and stretches with you, so no bunching or riding up.
Can I wear Shinesty’s Ball Hammock® pouch underwear for high-impact workouts?
Absolutely! The Ball Hammock® pouch is designed to provide superior support and reduce bounce, making it ideal for everything from running to weightlifting.
Are Shinesty’s underwear seamless?
Many of our styles feature seamless designs or flatlock stitching to eliminate chafing and visible panty lines, so you can move freely and confidently.
Do you offer underwear that matches for couples?
Yes! We have outrageously fun matching his-and-hers sets that bring a cheeky twist to your workout wardrobe.
How do I choose the right size for Shinesty underwear?
We recommend checking our size guide on shinesty.com for the perfect fit. Our zero-BS comfort guarantee means if it’s not right, we’ll help you fix it.
Ready to Upgrade Your Underwear Game?
If you just learned something weird, useful, or oddly sexy about underwear and you’re ready to upgrade your top drawer, Shinesty has got your back (and front). We’re the internet’s loudest, proudest, and cheekiest underwear brand — known for our revolutionary Ball Hammock® pouch underwear for men, outrageously soft and sexy underwear for women, matching his-and-hers sets, and dangerously comfortable loungewear. Whether you want to avoid wedgies at the gym, get serious about seamless comfort, or just rock some seriously bold undies, Shop now at shinesty.com and experience the best-fitting, softest, funniest underwear you’ve never worn (yet). Your workout — and your junk — will thank you.