Start with the hooks on the loosest row, then pull the front zip up slowly from the bottom while standing straight.
Smooth the fabric down over your hips so nothing rolls at the edge.
Sit down before you decide on the fit — if you can't sit comfortably, go one row looser.
Our Guarantee
If the size isn't right, tell us within 30 days and we'll send you the correct one free of charge.
And if it's still not for you, we'll refund you in full — no need to ship anything back.
Shipping Info
We offer fast and reliable shipping on all orders. Delivery usually takes 5 to 15 business days depending on your location.
Please contact our customer service team for assistance if you have any questions about your shipment.
I put on my TrueLine™ trainer under a fitted dress for a wedding in Chicago last weekend. My sister took a double take at my waist, completely shocked by how snatched and natural it looked. The flexible curved boning contours smoothly around your ribs without digging into your skin when sitting.
Jessica, Chicago, IL
★★★★★
My three workout partners and I all wore our TrueLine™ trainers during our morning pilates session yesterday. Everyone in the studio asked about our amazing posture and wanted photos of our group matching gear. The high-compression fabric holds everything firmly in place while remaining fully breathable throughout your workout.
Amanda, Austin, TX
★★★★★
I opened this wrapped TrueLine™ package from my best friend during my birthday lunch at the restaurant. I tried it on in the restroom immediately, and my whole table gasped when I walked back out. The double-stitched hook closure stays completely flat and invisible even under thin lightweight t-shirts.
There's a gap between how something looks on the hanger and how it looks at eight in the evening, and most of it happens around the waist. TrueLine™ closes that gap for as long as you're wearing it.
High compression through the middle, flexible boning that bends when you sit down, and a front zip that stays where you put it. Underneath a fitted dress it disappears completely.
Why People Love Our TrueLine™
🔒 Stays Closed
A front zip backed by a hook row, so nothing pops open halfway through dinner. You fasten it once.
🪶 Bends When You Sit
Curved flexible boning follows your body instead of digging in. The test is sitting down, and it passes.
✨ Disappears Under Clothes
Flat edges and smooth seams leave no ridge through fitted fabric. Nude under light colours, black under everything else.
Sit Down Before You Decide
Fasten the hooks on the loosest row first, then zip from the bottom while standing straight.
Smooth the fabric down over the hips so the bottom edge lies flat instead of rolling.
Then sit. If it digs in or you can't breathe easily, go one row looser — a size that's too tight shapes worse, not better.
TrueLine™ is made for occasions and long evenings, not for round-the-clock wear.
Six to eight hours at a time is the sensible limit, and it isn't made to be slept in.
For The Evenings That Matter
Most of these end up unworn in a drawer because they were bought in a hurry, in the wrong size, for a dress that was already too tight.
This one is for the opposite: you know what you're wearing, you know how long the evening is, and you'd rather spend it talking to people than adjusting something under your clothes.
30-Day Money-Back Guarantee
Try TrueLine™ Waist Shaper completely risk-free for 30 days.
If the size is wrong we'll exchange it free, and if it isn't right for you at all, contact us within 30 days for a full refund.
No stress, no hassle, just confidence with every purchase.
Collapsible content
What size should I take?
If you're between sizes, take the larger one — a garment that's too tight shapes worse and rolls at the edges. Measure your natural waist at the narrowest point and your hips at the widest, then check the chart above.
Will it show under fitted clothes?
The edges are flat and the seams are smooth, so there's no ridge through fitted fabric. Choose nude under light or thin fabrics and black under everything else.
How long can I wear it?
Six to eight hours at a time is the sensible limit, and it isn't made to be slept in. Compression garments restrict movement by design — take it off when the evening is over, and straight away if you feel pain or numbness.
Does it stay closed when I sit down?
That's what the front zip and hook row are for. Fasten the hooks first, then zip, and sit down before you settle on the fit.
How do I wash it?
Hand wash in cool water and hang to dry. No tumble dryer, no bleach, no ironing — the boning and the elastane don't survive heat.
Can I return it if I don't like it?
Absolutely! If the size is wrong we'll exchange it free within 30 days, and if it isn't right for you at all we'll refund you in full with no questions asked.
How do I get in contact?
You can send us an email at store@bramleyco.com and our team will get back to you as soon as possible.
Customer Reviews
Overall rating: 4.8 / 5 from 249 reviews.
Started using this high-compression waist cinch during my daily power walks around the neighborhood. Everyone in the studio asked about my amazing hourglass posture and wanted to know where I got it. The inner cotton lining feels incredibly soft against sensitive skin and prevents any sweating or pinching.
Wore my TrueLine™ trainer under a fitted dress for a dinner party with coworkers. Got several nice compliments on my posture and hourglass shape throughout the evening. Great back support and waist cinching, just takes a little patience to fasten the hooks initially.
I've been using this waist shaper during my home workouts for a few weeks now. Got several nice compliments on my posture and hourglass shape throughout the evening. It takes a second to hook up the first time, but once on it stays super comfortable.
Gave this TrueLine™ shaper to my best friend for her bachelorette party in Miami. My friends immediately demanded the link to buy one after seeing how flat my stomach looked. The double-stitched hook closure stays completely flat and invisible even under thin lightweight t-shirts.
Surprised my cousin with this TrueLine™ trainer as a surprise gift before her anniversary dinner. My best friend tried it on right away and ordered her own on the spot because of the instant results. The flexible structure shapes your waistline naturally while letting you sit, walk, and move freely.
Decided to wear this beneath my fitted jumpsuit for an evening date night downtown. My best friend tried it on right away and ordered her own on the spot because of the instant results. The durable stretch material maintains its strong shape and elasticity even after multiple hand washes.
Put this on for a Saturday afternoon shopping trip with my mom and sister. My friends immediately demanded the link to buy one after seeing how flat my stomach looked. The flexible structure shapes your waistline naturally while letting you sit, walk, and move freely.
I put on my TrueLine™ waist trainer under my favorite bodycon dress for a friend's wedding last weekend. Everyone at the party kept saying I looked incredibly sleek without realizing I had a shaper on. The durable stretch material maintains its strong shape and elasticity even after multiple hand washes.
Wore this snatched waist shaper under my fitted sweater dress during a winter evening party. People kept complimenting my posture all night long while I felt completely supported and comfortable. The heavy-duty front hooks are super sturdy and stay securely fastened even during intense movement.
Wore this snatched waist shaper under my fitted sweater dress during a winter evening party. My husband couldn't stop complimenting how curvy and smooth my silhouette appeared under my dress. The flexible curved boning contours smoothly around your ribs without digging into your skin when sitting.
Slipped this on under my tightest pencil skirt for an important office presentation on Monday. The trainer at the gym complimented my improved core posture and noticed how well it supported me. The targeted compression smooths out your waistline effortlessly without restricting your breathing at all.
I've been using this waist shaper during my home workouts for a few weeks now. Felt super supported around my core and loved how smooth my stomach looked under my top. It takes a second to hook up the first time, but once on it stays super comfortable.
Wore this sleek waist trainer under my birthday outfit during dinner at a rooftop lounge. Multiple people at the event asked if I had lost weight because my waistline looked so defined. The flexible structure shapes your waistline naturally while letting you sit, walk, and move freely.
I've been using this waist shaper during my home workouts for a few weeks now. Got several nice compliments on my posture and hourglass shape throughout the evening. Great back support and waist cinching, just takes a little patience to fasten the hooks initially.
Put this on for a Saturday afternoon shopping trip with my mom and sister. Everyone in the studio asked about my amazing hourglass posture and wanted to know where I got it. The seamless edges lie completely flat against your hips so there are zero visible lines under clothes.
Put this on for a Saturday afternoon shopping trip with my mom and sister. My coworkers kept asking what workout routine I was doing because my hourglass figure was so visible. The flexible structure shapes your waistline naturally while letting you sit, walk, and move freely.
Brought this waist shaper to my morning pilates class and wore it under my workout tank top. Everyone at the party kept saying I looked incredibly sleek without realizing I had a shaper on. The double-stitched hook closure stays completely flat and invisible even under thin lightweight t-shirts.
Bought this trainer to help support my back and smooth my waistline during daily errands. Got several nice compliments on my posture and hourglass shape throughout the evening. The compression is very strong, so make sure to check the size chart carefully before ordering.
Wore my TrueLine™ trainer under a fitted dress for a dinner party with coworkers. Felt super supported around my core and loved how smooth my stomach looked under my top. It takes a second to hook up the first time, but once on it stays super comfortable.
Put this on for a Saturday afternoon shopping trip with my mom and sister. My friends immediately demanded the link to buy one after seeing how flat my stomach looked. The inner cotton lining feels incredibly soft against sensitive skin and prevents any sweating or pinching.
Wore this sleek waist trainer under my birthday outfit during dinner at a rooftop lounge. My husband couldn't stop complimenting how curvy and smooth my silhouette appeared under my dress. The durable stretch material maintains its strong shape and elasticity even after multiple hand washes.
I've been using this waist shaper during my home workouts for a few weeks now. Got several nice compliments on my posture and hourglass shape throughout the evening. The compression is very strong, so make sure to check the size chart carefully before ordering.
Showed up at our group gym workout wearing this under a fitted athletic crop top. My friends immediately demanded the link to buy one after seeing how flat my stomach looked. The seamless edges lie completely flat against your hips so there are zero visible lines under clothes.
Showed up at our group gym workout wearing this under a fitted athletic crop top. Multiple people at the event asked if I had lost weight because my waistline looked so defined. The high-compression fabric holds everything firmly in place while remaining fully breathable throughout your workout.
I've been using this waist shaper during my home workouts for a few weeks now. It gave me a really nice instant cinched look that made my outfit fit much better. It takes a second to hook up the first time, but once on it stays super comfortable.
Surprised my cousin with this TrueLine™ trainer as a surprise gift before her anniversary dinner. Multiple people at the event asked if I had lost weight because my waistline looked so defined. The ergonomic side boning provides fantastic lower back support without rolling down at the top.
Showed up at our group gym workout wearing this under a fitted athletic crop top. I looked in the mirror and genuinely couldn't believe how snatched my waistline appeared instantly. The flexible curved boning contours smoothly around your ribs without digging into your skin when sitting.
Put this on beneath my tight t-shirt and high-waisted jeans for a weekend brunch with the girls. The trainer at the gym complimented my improved core posture and noticed how well it supported me. The ergonomic side boning provides fantastic lower back support without rolling down at the top.
Put this on under my high-waisted pants and a fitted top for a weekend outing. My friends noticed how smooth my outfit looked and asked what kind of shapewear I had on. Really holds everything in firmly, though it feels a bit snug during the first hour of wear.
Unwrapped this amazing TrueLine™ trainer that my sister got me as a birthday gift yesterday. Everyone in the studio asked about my amazing hourglass posture and wanted to know where I got it. The seamless edges lie completely flat against your hips so there are zero visible lines under clothes.
Showed up at our group gym workout wearing this under a fitted athletic crop top. My whole table gasped when I walked back into the room looking so instantly contoured and smooth. The high-compression fabric holds everything firmly in place while remaining fully breathable throughout your workout.
Put this on for a Saturday afternoon shopping trip with my mom and sister. My sister took a double take at my waist, completely shocked by how snatched and natural it looked. The seamless edges lie completely flat against your hips so there are zero visible lines under clothes.
Slipped this on under my tightest pencil skirt for an important office presentation on Monday. My coworkers kept asking what workout routine I was doing because my hourglass figure was so visible. The ergonomic side boning provides fantastic lower back support without rolling down at the top.
Gave this TrueLine™ shaper to my best friend for her bachelorette party in Miami. My sister took a double take at my waist, completely shocked by how snatched and natural it looked. The heavy-duty front hooks are super sturdy and stay securely fastened even during intense movement.
Surprised my cousin with this TrueLine™ trainer as a surprise gift before her anniversary dinner. My friends immediately demanded the link to buy one after seeing how flat my stomach looked. The heavy-duty front hooks are super sturdy and stay securely fastened even during intense movement.
I put on my TrueLine™ waist trainer under my favorite bodycon dress for a friend's wedding last weekend. My coworkers kept asking what workout routine I was doing because my hourglass figure was so visible. The durable stretch material maintains its strong shape and elasticity even after multiple hand washes.
Bought this trainer to help support my back and smooth my waistline during daily errands. Felt super supported around my core and loved how smooth my stomach looked under my top. Great back support and waist cinching, just takes a little patience to fasten the hooks initially.
Put this on beneath my tight t-shirt and high-waisted jeans for a weekend brunch with the girls. My sister took a double take at my waist, completely shocked by how snatched and natural it looked. The flexible curved boning contours smoothly around your ribs without digging into your skin when sitting.
Wore this snatched waist shaper under my fitted sweater dress during a winter evening party. Everyone in the studio asked about my amazing hourglass posture and wanted to know where I got it. The flexible curved boning contours smoothly around your ribs without digging into your skin when sitting.
Decided to test this curved waist trainer during an intense core workout at the fitness studio. My coworkers kept asking what workout routine I was doing because my hourglass figure was so visible. The double-stitched hook closure stays completely flat and invisible even under thin lightweight t-shirts.
