Breathable Lightweight Underwear For Your Sweatiest Workouts

These super soft and stretchy undies from Under Armour promise comfort all day long, whether or not you’re hitting the gym. They have laser-cut edges for a seam-free silhouette that is smooth and discreet beneath your clothes. They're available in eight different colors and in color variety packs in XS to XL.

Promising review: "Truly no-show panties. If you are having a hard time finding really no-show panties that are comfortable and last more than a few washings, you are not alone. I have tried about 8-9 different brands. These Under Amours are the real deal: super lightweight, fast drying, and no lines under even the most form-fitting clothes. I ordered these in medium from Amazon; I also have some size smalls and there is almost no difference in fit. I am about 5’ 6”, 120 lbs with an athletic build including my butt. These panties do have a cotton-y fabric liner in the crotch which is more comfortable when I dry them on low heat for about 5 minutes than when I let them just air dry. They also have some stitching where the pieces of fabric come together, rather than just being glued together like some brands are, so these are more sturdy." — Kathy L.

These New Balance undies come highly recommended via a colleague in our office Slack, who stated that they are the most breathable undies she's ever owned. Her claims are backed up by glowing Amazon reviews, as you'll see below. The thong is available in 10 different colors and pack combinations in sizes S to XL. They're made with a very lightweight nylon/spandex blend fabric with a cotton gusset to keep you cool, comfy and dry. They're also tagless and seamless, so you don't have to worry about a pair digging into your hips. They hold up well in the wash and are as durable as they are comfortable, making them a great investment.

Promisingreview: "Wonderful! They couldn't be any better unless they were free. But I want New Balance to stay in business for a long time to come. Wonderfully thin (like 20 denier hosiery material), soft (like a baby's skin), and delicate (like a spring breeze) with No rolled edge or seam Anywhere, just as they promised. What they didn't say is that it feels like you're not wearing them or anything else. I had to look to see if I had them on. I just hope they hold up to washing? Don't think I'll chance it, Hand washing is an option I will embrace just to keep them a little while longer. Oh, yea, an X-large fits a couple of inches bigger than a size 16, at least for a while, till I shrink myself. I hope they don't stretch and take a set." — Kindle customer

Available in 12 different colors in sizes XS to 2X, these lightweight briefs from Summersalt feel like you're wearing absolutely nothing, which is ideal during a hot, sweaty workout. They've got extra coverage and a mid-rise for those who don't love a thong moment, plus an elastic waistband. These eco-friendly underwear feature semi-sheer silky fabrics and are made from recycled plastic water bottles.

Promising review: "These briefs are great quality and paired with the bra make such a cute and comfortable matching set. The fabric is breathable and just the right amount of sheer." — Heather J.

Made from certified recycled yarns with an organic cotton lining, Parade's underwear is perfect for those looking for undies that disappear under clothing, even leggings. They're available in six different colors in sizes XS to 3XL and have even been sweat-tested by athletes.

Promising review: "Did the job for me! Not only are these so comfortable that you don't know you're wearing them, but they actually do what they claim. I am the sweatiest person I know, especially 'down there'. I have had LOADS of embarrassing situations where it looks as though I have wet myself if the weather gets too hot and I cannot cool off. I wore these on a hot day and when I was sure they would be tested. To be clear, it wasn't full-time-in-the-90s-for-over-an-hour-tested, but it was a time when I knew I would be sweating and they worked pretty well for me. I honestly do not recall being uncomfortable or worried in the least. That's saying something! I will definitely purchase more. I'm getting pretty close to replacing my whole panty drawer with Parade :)" — Stephanie B.

Available in 12 different colors including a beautifully wide range of nude shades, Girlfriend Collective's classic rise briefs have a smooth finish and bonded waistband. They're made with 80% recycled plastic bottles and 20% spandex and feature a moisture-wicking gusset liner and breathable fabric. They're available in sizes XXS to 6XL.

Promising review: "Soft, comfortable, durable, and overall amazing! Love this color and the feel of the material. This stuff is seriously soft and it's tough to take them off. I will definitely be buying more pairs." — Anna N.

These Alo undies are made from an extra-light version of the brand's signature luxurious and soft Airbrush fabric. They're odor-resistant, breathable and virtually invisible with a raw-edge finish. They come in 11 shades and sizes XS to L. Wear them everywhere, from work to your next HIIT class, and forget they're there.

Promising review: "Great Undies! I love this style of underwear! It’s my favorite thing in my underwear drawer! Great for wearing under leggings! The fabric is soft, and VPL is nowhere to be seen!" — Jessica T.