The 8 best pairs of cooling pajamas, as tested by a hot sleeper

Trust me when I say this is not your mother's signature nightie. Dagsmejan's sleep dress is constructed from the brand's "Natcool" fabric, which is 92% microlyocell, a natural microfiber from eucalyptus that is widely considered cooler than linen and trumps cotton at moisture management. It also feels like silk — cool to the touch and smooth. Plus, the remaining 8% of the garment is made with elastane, so it's super stretchy and non-constricting.

I love how the slip dress feels like a second skin and looks beautiful on. Waking up in a pool of sweat isn't sexy, but Dagsmejan's cooling sleep dress is.

You don't have to be experiencing menopausal hot flashes to reap the benefits of the Become nightdress (but if you are, keep reading). The brand's exclusive Anti-Flush technology is a serious game-changer for hot and sweaty sleepers of all ages and walks of life.

Here's how it works: The sleepwear's nylon fabric is made with a flat thread and knitted cross-section, and features a unique coating that works rapidly to transfer heat elsewhere, bring your temperature down, and evaporate moisture away from the body. A second coating then stores said heat and releases it back into the body during the chill that follows. This way, your body temperature remains stable through heat and chill. It also fights odors, so your sweat doesn't stink through your clothes.

It's worth noting that I'm as passionate about how this dress makes me feel as I am about how it looks on. This nightgown is gorgeous and wears like a second skin, almost like a slip dress. It's seam-free, lightweight, and comes in three colors: black, navy blue, and white.

Pact's sleep set has been, by far, my favorite bottom and top combo in terms of fit. The lightweight set strikes the perfect balance of comfort and breathability without being baggy. The tank top's straps are adjustable, so they won't slip off your shoulders constantly, and the shorts come with a drawstring so you won't have to hike them up all night.

I think the fit of these pajamas is one of the main reasons why they're so cooling. You aren't drowning in a surplus of material when you wear them, and they stay put while you toss and turn throughout the night. It's a combination of the set's breezy fit and the fabric — 100% GOTS-certified organic cotton — that makes them super lightweight and comfy.

I'll admit, I was skeptical to give Nest Bedding's long-sleeved nightshirt and matching pants a shot. I wake up drenched in shorts and a T-shirt, so I'm sure you can understand why long-sleeved sets wouldn't exactly be on my radar, especially in the summer. But after sleeping in both the long-sleeved top and bottom (together and paired with other various pj bottoms and tops), I can honestly say that Nest Bedding's set is the perfect option for hot sleepers who still enjoy a cozy pair of pajamas.

I've officially added these cooling pajamas to my nightly rotation for summer and beyond. The set is made from bamboo fiber rather than cotton or rayon — fabrics that are commonly known to be cooling. The waistline in the pants are also super stretchy.

The pajamas only come in three sizes (Small/Medium, Medium/Large, Extra Large), and in my experience, they're roomy and cozy in all the right places.

These cooling pajamas are made of 93% rayon, a manufactured, lightweight fiber derived from all-natural sources (think wood and agricultural products) that helps you stay cool and feel fresh. They're also gorgeously designed with leaf lace trimming along the V-neckline, which makes the set feel more like a luxury than a necessity. Soma's PJs generally run a bit larger, so I suggest sizing down if you like a more tailored fit.

My first impression of the sleepwear was that it looked like a pretty standard sporty tank top and shorts set, but a lot goes into making these cooling pajamas so effective.

To start, both pieces are constructed from the same Sheex performance fabrics as its sheets, which are incredibly breathable, moisture-wicking, and maintain your body's ideal sleep temperature. And unlike other cooling pajamas that are purposely designed a little looser to keep air circulating, Sheex's pajamas are breathable, but still fit close to the body. The top also features extra chest support and coverage on the inseam, plus criss-cross straps for a sporty aesthetic.

I've yet to come across an article of clothing by Aerie that I didn't love, so naturally I had high hopes for their new line of cooling pajamas. I'm happy to say that I wasn't disappointed by this set.

I typically gravitate towards pajamas that feel silky-smooth, but the brand's Real Soft blend surprised me. The pajamas are made from viscose, cotton, and elastane, which are known to be cooling, lightweight materials. The set also runs large (I'm an XS and it was loose on), so there's plenty of room for air to circulate, keeping you nice and chill throughout the night.

If nightshirts are your arch-nemesis, here's a tank to pair with all your favorite bottoms. While the Coolibrium brand is new to the market, I tested its tank dress ahead of launch and can vouch for how well it works.

The label uses a proprietary Thermal Regulation technology developed by MAS Innovation (whom you might recognize from their work with THINX) to keep your body cool and your temperature regulated overnight. It's a silky, breathable fabric that quickly and effectively transfers heat, is moisture-wicking, anti-odor, and antimicrobial. I loved sleeping in it, but I also loved wearing it outside to beat the summer heat.