Post-Maternity Underbust Stay Up Shaping G String - 2 Pack

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$116.00
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Color: Black and Nude

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We created this value pack of the Post-Maternity Underbust Stay-Up Shaping Thong featuring a classic Black, Nude & Tan combo for the perfect shaping solution for all your dark and light outfits.

Our Postpartum Stay-Up Thong provides maximum support and compression to help your body bounce back after having your bub! This shaper smooths your entire midsection while cinching in your waist and flattering your butt. This revolutionary thong design combines our comfortable stretchy fabric with a high-strength tummy control panel. Create a show-stopping silhouette with this powerful shaper that will make you look perfect in any outfit! The seamless finish ensures that there are no unflattering bulges in sight. With two sets of detachable straps (transparent and fabric), your shaping thong will stay put and won't roll down. 

  • Double-layer compression band for lower and upper tummy 
  • Maximum tummy control
  • Smooth-touch fabric for superior comfort
  • No VPL thong finish
  • Comes with 2x detachable straps (fabric and transparent)
  • Cinches in waist to make it look smaller
  • Underbust cut - can be worn tucked into bra to minimize rolling down
  • Includes two pairs of adjustable and detachable straps (transparent and fabric in a matching color)
  • No side seams and no tags minimize irritation
  • Creates sleek, slim body line

Care Instructions: Warm machine wash. Line dry.

Fabric Content: Nylon/Spandex

Please note that this item is not suitable to wear during pregnancy.

Please note that this product is not eligible for returns due to hygiene reasons. 

Control Level 3
Double-layer shaping fabric targets tummy zone with maximum control

Australia Shipping and Delivery

  • Free Standard Shipping on orders over $99.
  • Free Express Shipping on orders over $149
  • $10 Standard or $15 Express
  • Same business day dispatch on express orders placed before 1pm Melbourne time. Standard orders are despatched within 1–3 business days
  • Same day delivery in Melbourne – order before 11:30am, for eligible addresses within 50km of our Moorabbin warehouse (select at checkout)
  • Free Click & Collect from our Moorabbin VIC warehouse
  • International shipping available with tracking

Standard and express orders within Australia are delivered by Australia Post, with tracking emailed to you as soon as your parcel leaves us. Same day Melbourne deliveries are couriered by Go People.

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 CA standard size. If you do not have an idea of your approximate CA 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.


CA 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.

See How it Fits

See How it Fits

What customers say

4.8 Based on reviews