Navy Underwear Shorts | Anti-Chafing Breathable Slip Shorts

Fusion Shortlette Anti Chafing Slipshort 7" Length (Navy) Final Sale Clearance

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.

These navy underwear shorts 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 Short Length Fusion Anti-Chafing Breathable Slip Shorts 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
4.8 Based on 50 Reviews
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
  • dresses
  • pair
  • skirts
  • color
  • coverage
  • fabric
  • products
  • waistband
  • flash
  • shortlettes
United States United States

Not this style

First time ordering the fusion style, and unfortunately, it did not work for me. I returned them. The waistband construction causes more bulk under clothing. I've been a big fan of the earlier lace shortlettes style (short length)...the ones with the lace waistband and leg. These laid much flatter under my clothing, and I appreciates the shorter leg length as I am not very tall.

Diana R.
United States United States

Life changing!

I heard about these products on Pantsuit Politics and it has been a game changer for me! Love this product!

United States United States

Great! Love them.

So comfy! And I love the color of the navy ones. I've owned several pairs and styles of shortlettes and they are so comfy and useful. I love wearing them under skirts, but I also love wearing them under jeans! They really make jeans so much more comfortable. I love that they don't squeeze or pinch, but they aren't baggy or loose either. So great! I reccommend giving them a try!

United States United States


I absolutely love these!!! I own several pair but these are my favorite. So light and comfortable. Makes you feel like you have a little extra coverage when wearing a dress.

United States United States

New Favorite Garment

The Fusion shortlette is fabulous! I've worn them under longer pants/shorts when chafing is a problem and they've worked great. I also wear them under a longer dress. They are too sheer to wear when they might be seen in their entirety, but perfect for longer dresses, or only small flash under a shorter dress.

Jessica N.
United States United States

Love them

Totally light, adds no bulk or heat, does the trick!

United States United States


Love these. I like to wear dresses but like to have coverage when I bend over. They don't ride up as other products I have tried. Are not binding as bicycle shorts tend to be. Have ordered many in multiple colors to coordinate with my summer dresses.

United States United States

Light, comfy

I love that you don’t have to wear underwear underneath them, and of course that they prevent inner thigh chafing. They are light, not restricting and comfy,

United States United States


They fit great and we're super comfortable. The only problem I had (super small one) is that if you wear a pantyliner or a pad with it doesn't stick to the fabric. But other than that they are excellent!

Janet P.
United States United States

Love my navy slip shorts!

These are the perfect length, color and style. They stay in place nicely and are very cute!

United States United States

So happy I purchased these!!

I wear dresses 90% of the time. Being larger in the leg, and a kindergarten teacher who is always on the floor,I always wear some kind of short underneath. Running shorts have too much compression but THESE shorts are amazing! So comfortable and no roll!! I will definitely be purchasing more!

laurie s.
United States United States

Exactly what I wanted

I have been looking for a way to be comfortable in dresses or skirts without having to wear suction (spanx) wear and these are perfect. Comfortable, no thigh rubbing and no fabric that creeps up. The only thing to be aware of is there are seems so if you have something form fitting and tight- it might not be what you want. I bought two and will now try the pair with a pocket for a phone. I really like the lace at the bottom.

United States United States

Perfect fit


Karen C.
United States United States

Love the color

They are different than others I’ve tried but work very well. Glad you have a variety of color options.

Rena C.
United States United States


These are comfortable, don't ride up, the waistband doesn't roll, and they fit perfectly.

United States United States

First time buyer

I found them very comfortable and a perfect fit!! If the wind blows, I feel I can have a Marilyn moment!!! Will keep an eye on the sales for more!!!

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