Maternity Strapless Knee Length Slip Dress

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Alternate Product
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Our Maternity Strapless Knee Length Slip Dress is the ultimate layering essential designed to grow with you throughout pregnancy and beyond. Made using Italian Santoni seamless machinery, this dress offers an ultra-flexible fit that effortlessly adapts to your changing body, providing maximum comfort at every stage. The silky-smooth fabric is gentle on sensitive or hormonal skin, making it perfect for those delicate months.

Whether you're wearing it under a maternity dress or layering it with a sheer outfit, the seamless construction ensures no visible lines, creating a smooth, flattering silhouette. Its versatile knee-length style gives you multiple options: wear it as a slip, midi dress, or under sheer layers for a polished look. The high-quality, fast-drying fabric is ideal for warmer weather, travel, or busy days, and its resilient nature allows it to recover its shape, making it just as comfortable postpartum as it is during pregnancy.

Designed with longevity in mind, this slip dress is not just a maternity essential, it’s a wardrobe staple that will continue to offer comfort and support after pregnancy, ensuring you’ll be able to enjoy it for years to come.

  • Made using Italian Santoni seamless machinery for an ultra-flexible fit that effortlessly adapts to your changing body
  • Silky-smooth and gentle against sensitive or hormonal skin
  • No visible lines, perfect for layering under maternity or nursing outfits
  • Creates a smooth, flattering silhouette under dresses and skirts
  • Fast drying, ideal for warmer weather, travel, or life on the go
  • High-quality, premium fabric designed for long-lasting wear
  • Versatile knee-length style that can be worn as a slip, midi dress, or layered under sheer pieces
  • Resilient fabric that recovers its shape so you can continue wearing it comfortably after pregnancy
  • Designed to wear before, during and after pregnancy

Fabric Content: Nylon/Elastane

Care Instructions: Wash before wear. We recommend hand washing. Line Dry.

Please note that this product is made from a delicate smooth-touch fabric designed to be worn as a soft undergarment and is therefore not eligible for returns due to hygiene reasons.

USA Shipping and Delivery

  • $6 Flat Rate Standard Shipping for orders under $89.
  • $12 Flat Rate Express Shipping for orders under $139.
  • Free Standard Shipping for orders over $89.
  • Free Express Shipping for orders over $139. 
  • Free Express Shipping + Gift for orders over $189. Use of discount code may void free shipping unless the total order payment is over $189.
  • Express Shipping: Total dispatch and delivery time is 2-5 business days.

Tracking Your Order: Once your order is placed, you will receive a tracking number via email. You can track your parcel through the link provided by email.

Easy returns & exchanges  |  Full shipping & delivery policy →

Made on circular machinery, our seamless intimates and apparel range offers stretchy support and easy flexi-sizing making it easy to shop online.

We recommend ordering according to your usual US standard size. If you do not have an idea of your approximate US size, you may check the size chart for body measurements and look on each B Free product to find your corresponding B Free size.

As a general guide, we recommend ordering tops & slips according to your bust size, shapewear according to your hip size, and underwear according to your hip size. Note that this can vary depending on your body shape and personal preference.


US Size

Bust (tops & slips only) Waist Hip Thigh circumference at widest point (anti-chafing midi shorts only)
  Measurements in inches
2 33"-34" 25"-26" 34"-35" 20"-21"
4 35"-36" 27"-28" 36"-37" 21"-22"
6 37"-38" 29"-30" 38"-39" 22"-23"
8 39"-40" 31"-32" 40"-41" 23"-24"
10 41"-42" 33"-34" 42"-43" 24"-25"
12 43"-44" 35"-36" 44"-45" 25"-26"
14 45"-46" 37"-38" 46"-47" 26"-27"
16 47"-48" 39"-40" 48"-49" 27"-28"
18 49"-50" 41"-42" 50"-51" 28"-29"
20 51"-52" 43"-44" 52"-53" 29"-30"
22 53"-54" 45"-46" 54"-55" 30"-31"
24 55"-56" 47"-48" 56"-57" 31"-32"


If you are still unsure about your size after referring to this guide, email our friendly customer service team at contact@bfreeaustralia.com.au. Be sure to include your relevant body measurements and the style that you are interested in.