Adjustable Tummy Control Waist Trainer
A firm, adjustable waist trainer that smooths your midsection and supports your back, at the gym or under a fitted top.
- Adjustable fit: Wrap-around straps let you set how firm it feels and change it through the day.
- Tummy control: Targets the waist and lower belly for a smoother line.
- Back support: Helps you sit and stand taller while you work or train.
Details
An adjustable wrap for the waist. Choose your preferred color and size.
A firm, adjustable waist trainer that smooths your midsection and gives you an instantly more defined silhouette. Wear it under a fitted top, over leggings at the gym, or around the house for everyday support.
Why you'll love it
- Adjustable fit: wrap-around straps let you choose how firm it feels and adjust it through the day.
- Tummy control: targets the waist and lower belly for a smoother line under clothes.
- Back support: encourages better posture while you sit, walk or work out.
- Easy on and off: no hooks to struggle with.
- Sizes XS to 3XL in six colors.
Size chart
Measure around the narrowest part of your waist. If you are between sizes, choose the larger size.
| Size | US | Waist (in) | Waist (cm) | Hip (in) | Hip (cm) |
|---|---|---|---|---|---|
| XS | 0-2 | 25–27 | 64–69 | 34–36 | 86–91 |
| S | 4-6 | 27–29 | 69–74 | 36–38 | 91–97 |
| M | 8-10 | 29–31 | 74–79 | 38–40 | 97–102 |
| L | 10-12 | 32–34.5 | 81–88 | 41–43 | 104–109 |
| XL | 14-16 | 35.5–38 | 90–97 | 43.5–46 | 110–117 |
| 2XL | 16-18 | 39–42 | 99–107 | 46.5–49 | 118–124 |
| 3XL | 18-20 | 43–46 | 109–117 | 49.5–52 | 126–132 |
Care
Hand wash cold and lay flat to dry, away from direct sun. Do not machine wash, wring, bleach, tumble dry or iron.
Start with a few hours a day and increase gradually. Remove it if you feel discomfort or shortness of breath.
Shipping
Ships from our warehouse. Estimated delivery: 5–15 business days including order processing. Tracking included. Shipping cost is shown at checkout.
Exchanges & returns
Not the right fit? You have 30 days to request an exchange or a return. Items must be unworn, unwashed and with tags attached. How it works.
Questions?
Email contact@saintmaren.com with your measurements and we will help you choose your size. See also the FAQ below.
Why you'll love it
A firm, adjustable waist trainer that smooths your midsection and supports your back, at the gym or under a fitted top.
Adjustable fit
Wrap-around straps let you set how firm it feels and change it through the day.
Tummy control
Targets the waist and lower belly for a smoother line.
Back support
Helps you sit and stand taller while you work or train.
XS to 3XL
Six colors and seven sizes, with a measured size chart.

Instant waist definition
Firm compression wraps your midsection so tops and dresses fall in a cleaner line from the first wear.
- Firm, even compression
- Smooths the lower belly
- Defines the waist

You choose the pressure
The straps close wherever feels right, so you can start loose and go firmer as you get used to it.
- No hooks to struggle with
- Easy to adjust on the go
- Wear it over or under clothes

Made for movement
Wear it over leggings for a workout or under a fitted top for the day.
- Supports your posture
- Stays in place when you move
- Hand wash, quick to dry
How to wear it
Three simple steps for the best fit.
Step in
With the gusset open, step in and pull the bodysuit up over your hips, smoothing the fabric as you go.
Settle the top
Slip on the straps or sleeves, adjust the straps and position your bust comfortably.
Close and smooth
Fasten the gusset and smooth the fabric over your waist so there are no folds. That's it.
Pairs well with
Our favorite pairings for a smooth line from top to bottom.
Better together
Add the pieces that finish the look in one tap. Pick each size first.
Questions, answered
Does a waist trainer make you lose weight?
No. A waist trainer shapes your silhouette while you wear it and supports your posture. It does not burn fat or change your body on its own.
Can I work out in it?
Yes. Many customers wear it over leggings for walking, weights and cardio. Drink water and take it off if you feel lightheaded.
Can I wear it under clothes?
Yes. It is slim enough to sit under fitted tops and dresses; the nude and black shades are the most discreet.
How do I choose my size?
Measure your waist at its narrowest point and your hips at their fullest, then compare with the size chart in the Size guide on this page (available in XS to 3XL). If you are between two sizes, choose the larger one. You can also email contact@saintmaren.com with your measurements and we will recommend a size.
How many hours a day can I wear it?
It is made for all-day wear. If it is your first shaper, start with a few hours and build up. Take it off if you feel discomfort or shortness of breath.
How do I wash it?
Hand wash in cold water with a mild detergent and lay flat to dry, away from direct sun. Do not bleach, wring, tumble dry or iron. Gentle care keeps the compression working for longer.
How long does shipping take?
We ship to the US, UK and Canada. Estimated delivery is 5 to 15 business days, including order processing, and you get a tracking number by email as soon as your order ships. Every order arrives in discreet, unbranded packaging. Shipping details.
Can I exchange or return it?
Yes. You have 30 days from delivery to request an exchange or a return. Items must be unworn, unwashed and with their tags attached. See our Returns and Exchanges page for the steps. Returns and Exchanges.
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The Saint Maren promise
Tracked shipping to the US, UK and Canada, discreet packaging and 30 days to exchange or return. If it is not right, we will make it right.
- Tracked shipping US · UK · CA
- 30-day exchanges
- Discreet packaging
- Sizes XS to 6XL


