Navy Underwear Shorts | Anti-Chafing Breathable Slip Shorts

Fusion Shortlette Anti Chafing Slipshort 7" Length (Navy)

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

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 43 Reviews
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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!!!

United States United States


This was exactly what I was looking for, very comfortable! I will definitely buy another pair!

Gae W.

The product is brilliant and

The product is brilliant and the service is as well. My only frustration is that the fun coloured ones are always sold out. I (and my friends) would like some more fun ones,if your skirt flips, give us perzazz!

Alexandra L.

This has been my first

This has been my first purchase of undersummers. Am finding them very comfortable.

Carol D.

I have loved Undersummers but

I have loved Undersummers but this last pair I bought are not as roomy as all others I have purchased, which are quite a few. Don’t know what was done differently but they are not as comfy as all my others.

Jill L.

Nice, would've nice if there

Nice, would've nice if there was a cotton option

Heather M.

Love having the shorter length

Love having the shorter length for shorter dresses! But the lace is cute so even if it peeks out on occasion I don’t mind. :)

Karen B.

Love this product! As a

Love this product! As a kindergarten teacher I had given up wearing dresses for modesty reasons. So nice to be wearing them again.

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