Cool Tank Sleep Shirt

$ 22.50 Regular price $ 45.00
14 reviews
Color - Hearts

Final Sale.  Undersummers Shortlettes are comfortable lounging underwear and now you have the perfect complement, tank style pajama dress.  Made with our signature silky microfiber fabric with moisture-wicking technology for all-night comfort.  Features beautiful lace details and scooped neck for added comfort.

Mix and match our cool pajama dress with your favorite Shortlette Slipshorts! 

  • 96% Poly/ 4% Spandex
  • Machine wash cold, machine dry
  • Made in California, USA of imported fabrics

We want you to love your Undersummers undergarments and be comfortable.  If your first purchase of a Shortlette or Undergarment isn’t quite right, we will send you one free replacement. *Offer excludes Clearance or Final Sale Items.

Pre-paid returns (USA only): Simply send back your items for return with your prepaid return label, only unworn garments (clean & new with hang tags intact). We do apply returns to the tender it was purchased, record of sale is required (order number). Gift card returns will be issued back to a gift card.


  • Items ineligible for return/refund/exchange:
  • Gift Cards
  • Grab Bag
  • Clearance Items (Final Sale)
  • Free Gifts
  • Worn garments or items not in original condition.
  • Garments over 30 days old.

Click here to learn more about Undersummers Returns

At Undersummers we want women to LOVE their thighs! CarrieRae Munson is the founder and creator of the Original Shortlette® anti thigh chafing solution to wear under skirts and dresses. Undersummers Shortlettes are lingerie-inspired anti thigh chafing slip shorts made to protect your thighs all day and night. Quality is in the details with silky soft fabric, beautiful laces, and unique designs which function beyond your wildest dreams. CarrieRae doesn't stop there - she selects beautiful colors and playful prints to make these your all time go-to favorite underpinning.

Our mission is to help women love wearing dresses. Dresses and skirts are feminine, pretty, and powerful. We offer fabulous Shortlettes®️ to provide comfort and confidence.

"I want women to love wearing dresses. Dresses are fun, flirty, and a confidence booster.  We make undergarments that help make that possible!"  CarrieRae, Founder of Undersummers.

Our process: We listen at Undersummers. All of our new products are the result of customer feedback and customer requests.  Don't be surprised to get an email directly from CarrieRae - she reads your emails in an effort to stay connected to your wants and needs. Some current examples of products requested by customers are the launch of the Fusion Shortlette, our full coverage Shortlette Rash Guard Slipshort in a 5X and the Maternity Line Sized Small-4X. We also happen to be one of the few companies on the market to size so inclusively. 

Customer Reviews
4.9 Based on 14 Reviews
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Katherine P.
United States
I recommend this product

Loose large arm holes

Breast come out arm holes

angela l.
United States United States
I recommend this product


I bought the cool tank sleep shirt. OMG I love love love this item. The fabric and cool and soft. The material does not stick to the skin like some silky clothes do. It feels luxurious and soothing at the same time. I can't believe it's this good for low price but it is. The funny thing is I bought it by fat fingers mistakenly hit the buy now button.. so I figured I would go through with it and I am soooo glad I did.

Ruby H.
United States United States
I recommend this product

Love this sleep shirt!

I love, love, love this sleep shirt. It truly does keep me cool in the very hot climate I live in. If you still had my size in stock, I would probably order at least 2 more.

Becky S.
United States United States
I recommend this product

Very nice cooling sleep wear

I really like this sleep dress. I sleep hot so cooling pjs is absolutely what I need year round. It is comfy and pretty, and doesn’t bunch up. I own three of these from Undersummers, and would buy more if they had additional colors in stock.