Black Anti-Chafing Slip Shorts | Moisture-Wicking Black Shorts

Fusion Shortlette Anti Chafing Slipshort 7" Length (Black)

3/$90 - Any 3 Reg. Priced Fusions - Code: FUSION3

Size Guide


Undersummers Short Length Fusion Shortlette™ Slipshorts are the perfect high waist rash guard panty shorts that provide the ultimate thigh protection for women now with a shorter leg length for shorter skirts and dresses.

Shortlettes are foundation wear that are not shape wear, and are non-constricting. Our Short Length Fusion chafe prevention slip shorts are a combination of our Lace Shortlettes leg feature and leg length with our Classic Shortlette waistband. 

Our Fusion black moisture-wicking, anti-chaffing slipshorts are available in both regular and plus sizes.

Why Undersummers Short Length Fusion Shortlettes?

  • High waist rise
  • 7” seamless inner thigh for maximum protection
  • Stay-put leg design resists leg creep while walking or running
  • Seam free inner leg is added anti-chafe protection and longer wear
  • This is a panty, no need for a second heat inducing layer
  • Assembled in the USA





Customer Reviews
4.6 Based on 104 Reviews
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Diana R.
United States United States

Life changing

Well made and comfortable for all seasons!

United States United States

I ❤️Undersummers!

They’re SO soft & comfortable. I love wearing my dresses again because these wonderful slip shorts eliminated annoying chafing.

United States United States

Wanted to Love

But they don’t stay up so I spend my day pulling them up from the waistband that rolls down constantly. I wondered if I bought the wrong size at first, but a size smaller and they’d be too tight in my thighs. The fabric is a bit thicker than anticipated and in my Southern California desert adjacent city it’s too much.

Mary J.
United States United States

Loving Fusion Shortletts!

I have purchased four pair of these wonderful slipshorts and find them entirely comfortable! Their care is a breeze as well! They make wearing a dress so easy without worry of the dress riding up at any time!! I definitely recommend this product!!

United States United States

They are great.

Kaycee R.
United States United States

Favorite "Under"garment by far

so comfortable, doesn't "roll" I forget I am wearing them! Summer is not a problem anymore!

Charlotte T.
United States United States

Forget about it

I put them on for the first time and forgot about them. They were so comfortable that this new profile underwear required little brain width. I wore them under a straight thin nylon dress with high slits on either side. The day was uncomfortably hot. A little ditty accompanied my travels that sang “aren’t you so cleaver. You are so cool. You choose bright royal blue instead of disappearing black.”. My dress fanned and the shortletts accepted admiring glances. A sticky day in a hot city passed well.

United States United States

Life Changer

These are going to save my life. They stayed in place all day and kept my legs from rubbing together. A 3 mile walk that would have normally ended in pain was enjoyable and I didn’t have to worry! I can’t recommend them enough!

United States United States

Love undersummers

Undersummers are cool, comfortable and no slip required

Jessica V.
United States United States

Love these

They fit great and are perfect under dresses

Alison G.
United States United States

Exactly what I was looking for

I am short (5'1") and stout (175 lb) and these fit perfectly in size XL. Allows me to go wear a summer dress and still take long walks around the neighborhood without chafing. Doesn't ride up like the Jockey slip shorts I've worn.

United States United States

Light and Comfy

These are as great as my sister-in-law promised. I want to wear them all the time and they look very cute poking out of my mini skirt. The only thing is I wish I had gotten longer ones because they do ride up on me after I am sitting and scrape a little where the lace is. I haven't tried them for a long walk yet but I can foresee some problems, but I think if they were longer they would be perfect. I'm 5'9" and about 240 lbs.

United States United States

Comfortable I’m planning on ordering a few more

They are soft and Comfortable I’m planning on ordering a few more

Maranda S.
United States United States

Super cute but

I’ve only worn them once and the lace has a hole already. They also don’t stay up at all and roll down under my belly. I may need to try a smaller size.

Camela J.
United States United States

Should have bought these years ago!

I found undersummers a few years ago but didn't buy them. I totally should have! I love to wear dresses in the summer but hate that sweaty-ness that chafes. These slipshorts are light and airy, formfitting without hugging too tightly. I feel confident knowing I will be comfortable all day and can wear my cute dresses with ease. Now, I need to buy a few more colors, so I have one for everyday of the week! My daughter wants some too!

Aracely C.
United States United States


I feel so much more confident wearing dresses. They weren’t joking about it not rolling. Super comfortable. I’ll be buying more for myself and as a gift to my friends.

We recommend ordering based on your measurements
 Size (USA) Waist (in) Hip (in)
Small 30-31 37-38
Medium 32-33 39-41
Large 34-36 42-45
X-Large (1X) 37-38 46-49
2X 39-42 50-53
3X 44-48 54-57
4X 49-53 58-61
5X 54-58 62-66
 Size (USA) Waist (cm) Hip (cm)
Small 76-79 93-97
Medium 81-84 99-104
Large 86-91 106-114
X-Large (1X) 93-96 116-124
2X 99-107 127-134
3X 112-122 137-144
4X 124-134 147-154
5X* Fusion only 137-147 157-163


Shortlettes are generously sized  to hug but not squeeze your curves.  They are not compression and do not feel like nylons/hosiery, shapewear, bike shorts, or compression pants.  Shortlettes are simply comfortable.  They are not made to be tight, feel constricting, shape, pinch, or bind.  The longer lengths allows for maximum chafe protection and comfort.

Correct Fit Guidelines:
✔️ Waist should not roll
✔️ Body should glide comfortably against the skin
✔️ Legs should not ride up while walking

Signs of Incorrect Fit:
✖️ Baggy crotch (too big)
✖️ Running at the seams/Wears to fast (too small)
✖️ Slides Down (too small)
✖️ Legs ride up (too small)

Which is the best fit?

CarrieRae's Recommendations:

Under 5'4" - High Thigh, Athletic, or Classic Styles

Plus Size - Fusion, Classic, or Original Lace

Apple Shaped - Fusion, Classic, or Original Lace

* Order the size in-between your waist and hip measurement.  I.e.  Waist 3X + Hip XL = Order 2X

Pear Shaped - Try them all!

Hourglass - Lace or High Thigh

Slender - High Thigh or Athletic

My Shortlettes fall down, why? Are Shortlettes shape wear? Are they compression shorts?
How are Shortlettes different than other slip shorts or bike shorts? How long do Undersummers products last? Can you let your Shortlettes Show?

Contact Us:  Do you have a question that is not answered here?  Email us at and we will respond within 1 business day. 

updated 6/22/20