Undersummers Review: The End of Thigh Chafing?

Thicc thighs are trending right now. As a girl who’s body type is best described as aggressively pear-shaped (my pants are 2 sizes larger than my tees), this is very exciting for me.

And as someone who would need to be seriously emaciated and slightly bow-legged to get a thigh-gap, I have something to say:

Thigh chafing isn’t about size, it’s about thighs.

Dresses and skirts can be a nightmare when your thighs touch, and what are the solutions?

Boy-short underwear don’t cover the thighs. Bike-short style shapewear are uncomfortable and sweaty. Anti-chafing gel wears off fast. And don’t even get me started on pantyhose. No, really—“flesh-toned” according to whom?

Then one of my favorite fashion bloggers flashed a pair of slip shorts from under her maxi dress and I thought, “wut?” She swore by these Undersummers shortlettes for barely-there zero-chafing underwear goodness.

Undersummers Classic Shortlette
  • Crafted with Quality: Our classic Shortlette slip shorts for under dresses, made in the USA, feature a...
  • Self-Love Embraced with Slip Shorts: Experience self-love and confidence with our slip shorts for women...
  • Comfortable All Day, Every Day: Our slip shorts for women under dress redefine comfort. The shorts are...

So I did what any self-respecting independent thinker would do—I immediately opened a new browser tab to check them out. And then, because this could be wardrobe-changing for me, I bought two pairs.

Is the end of thigh chafing in sight? I wore the *expletive* out of both Undersummers slip shorts for 2 months to find out—and here’s my answer.

Undersummers Classic Shortlette Review

Undersummers Classic Shortlette

Before we start, just let me stress something: these are not shapewear

The Undersummers Classic Shortlettes are ultra-lightweight and silky-soft. There’s no restrictive compression to create bulges above the waistband or below the hem.

There are no elastics or silicone grips. Undersummers use a 96% Polyester / 4% Spandex fabric blend which manages to deliver moisture-wicking and breathability in what looks like a bike short.

Plus there’s an easy-breathing cotton gusset, which makes them snuggly and comfortable as sleepwear, too.

And here’s the good bit: they’re designed to eliminate ride up, roll-down, and rubbing

The seam-free inner thigh protects my delicate thigh meat from friction and rubbing, making dresses mercifully comfortable even when I’m running around in 85° weather.

Combined with the fabric’s moisture-wicking capabilities, I can wear the Undersummers Classic shortlette all day, and all night, without anything starting to feel raw or swampy.

What I loved…

  • Cool, lightweight, and breathable fabric.
  • Ultra-durable. Non-pilling, resilient fabric, and no pulling around the flatlock seams, gives these shortlettes a longer lifespan. These are designed to last.
  • Seam-free inner thigh gives long-lasting comfort and eliminates the worry of rips and stretching around the stitching.
  • High-waisted to eliminate roll-down and stay comfy no matter your size.
  • Speaking of size—these are incredibly inclusive, with a size range from Small to 5XL.
  • 6.5” in-seam means the shortlette hem doesn’t cut into the chunkiest part of my thigh.
  • Range of neutral shades: Black, White, Beige, Ecru, and Mocha.
  • Range of colors: Yellow, Neon Pink, Bright Coral, Chartreuse, Mint, and Royal Blue.

What I didn’t...

  • There’s no getting around it—shortlettes aren’t sexy. If you and your dress have a Marilyn Monroe moment, you’ll look like you’re wearing Spanx.
  • Undersummers Classic shortlettes are machine washable (cold only, please!) but they can’t be tumble dried. Fear not, though—they dry fast on a towel rack.
  • Price. Undersummers’ offerings sit at a premium price point, but they deserve to be there. High-quality fabric, expert construction, and a strong solution to an awkward problem make these my go-to on dress and skirt days.

Best for…

Everyday wear, these beauties will take you right through summer, from morning to night, and they’re comfortable enough to sleep in.

A Word of Advice…

Undersummers’ entire line is only available online, and their sizing is a little different from standard underwear ranges. Check their sizing chart online and make sure you’ve got the right measurements before you order.

Undersummers Originals Shortlette Review

Undersummers Originals Shortlette

Undersummers also do an ultrasoft Originals line which delivers the same breathability and lightweight snuggliness of the Classics line—but with lace!

A high-waisted lace panel and lace edging around the legs are smooth, silky, and lend a little sex appeal to what is probably a decidedly unsexy undergarment.

What I loved…

  • Longer 9” in-seam gives added coverage and comfort.
  • Pretty, feminine lace detailing doesn’t roll down around the waist or ride up in the legs.
  • Same durable, breathable choice of fabric.
  • Seam-free inner thigh delivers the same level of thigh protection and wearability.
  • Inclusive sizing from Small to 4XL.
  • Wide color range: Beige, Ecru, White, Black, Lilac, Neutral Pink, Peach (a great warm-nude color for fair skin tones), Blue, and Pink

What I didn’t love…

  • The lace waistband has a fairly loose fit when I bend over, meaning I have to adjust it and settle it back into place when I stand back up. Maybe going down a size would have solved the issue, but my Undersummers Originals deliver a great fit for my legs, thighs, and butt.

Best for…

Those who want a cuter, lacier look.

Personally, I don’t wear my Undersummers for aesthetic purposes. I wear them to save my thigh skin from being razed off as I race for the subway at the end of the day, and to keep all of this *gestures wildly from my waist down* covered on windy days. If I want to give hubby an eyeful—or anyone else, for that matter—I’ve got other underwear to do that trick.

Having said that, hubby ain’t mad at the black Undersummers Originals and a black lace bralette, either.

My Overall Undersummers Review 

Undersummers shortlettes are a non-restrictive, non-shaping slip short that protects the thighs from chafing and rubbing. These nifty, lightweight undershorts are carefully designed not to roll-down around my (not-so-flat) belly, or ride up my legs as I go about my business.

And just in case you're a bit skeptical (like I can be), here's a second opinion:

If you want to feel confident striding it out in a skirt on a windy day—try these.

If you want to wear dresses in summer without liberally basting your lower body in anti-chafing gel—try these.

If you’ve learned that fashion needs to fall in line with your body—and not the other way around—try these.

So, yes, to answer my earlier question:

Once I got my wallet around the premium price tag, Undersummers Classic shortlette was the end of thigh chafing for me. Can it do the same for you?

Feeling inspired to give Undersummers a try? Here’s my favorite pair!

About the author

Kelsey Summers

Kelsey is the lead editor of Undywear.com. She's a fashionista who's written for Glamour, GQ and others. She enjoys breaking the stigma and taboo around underwear and writing about all things fashion.