01
Flatter Chest
Chest fullness sits closer beneath fitted shirts.
BUY 1. GET 1 FREE - 2 FOUNDATION SINGLETS FOR £25. NO CODE.
Hidden gear for the shirt above it.
Control What Your Shirt Shows.
The Foundation Singlet holds the chest, stomach and sides closer for a cleaner-looking shirt line while worn.
BUY 1. GET 1 FREE
2 Foundation Singlets - £25
Get 2 For £25
See The Same-Shirt Proof
No code. One-time purchase. Black or White. M-5XL.
Four places the shirt fit changes.
Control What The Outer Shirt Exposes.
02
Flatter Stomach
The side profile projects less through the same shirt.
03
Smoother Sides
The shirt drops cleaner across the back and waistband.
04
Shirt Fit
Help the outer shirt drop with less clinging and pulling.
Controlled same-shirt fit proof.
Same Man. Same Shirt. One Changed Variable.
Same man. Same shirt. Same angle. Same lighting. Under Rig is the only changed variable. Cosmetic effect applies while worn; individual results vary by body and fit.
Flatter chest. Cleaner stomach-to-waist line.
Less projection. Straighter shirt drop.
Smoother sides and a cleaner waistband transition.
Built-in tension cues the shoulders back for a stronger-looking upper-shirt line while worn.
The size-up trap
A Bigger Shirt Hides One Area By Ruining The Rest.
Sizing up loosens the collar, shoulders and sleeves without controlling the torso. Under Rig works beneath the shirt so the fit you chose can stay intact.
The product behind the difference
The Foundation Singlet.
A longer, low-profile compression base layer engineered for the chest, stomach, sides, back and shoulder line beneath clothing.
Available in Black and White, from M to 5XL.
Verified compression knit and construction
Engineered under the shirt
Control Where The Shirt Needs It. Disappear Where It Doesn't.
Chest control
Torso compression
Side + back smoothing
Shoulder tension
Longer torso + anti-roll hem
Zoned Torso Control
Chest, stomach, side and back control work together across the complete shirt line.
Integrated Shoulder Tension
Built-in tension cues the shoulders back for a stronger-looking shirt line while worn.
Shape the torso. Square the shoulders. Keep the singlet hidden.
The whole shirt line changes
One Cleaner Silhouette.
- Chest sits flatter
- Stomach projects less
- Sides look cleaner
- Waistband breaks less
- Shoulders sit stronger
Not another cheap elastic tank
Built To Disappear. Built To Stay Put.
01Low Scoop Neckline
Designed to stay hidden beneath compatible collars.
02Deep Armholes
Low-profile edges sit beneath the outer shirt.
03Longer Torso
Extra coverage keeps the control system below the waistband.
04Compression Construction
Verified knit, stitching and anti-roll hem detail.
Built under every shirt that matters
Hidden Underneath. Better On Top.
01
Fitted T-Shirt
02
Polo
03
Button-Up
Built to move. Built to stay hidden.
Real Life Is Not A Mirror Pose.
Sitting
Long torso coverage is built to stay tucked through the working day.
Reaching
The longer cut and anti-roll hem help keep the base layer in place.
Driving
Controlled construction stays discreet beneath everyday clothing.
You buy it for the moment
Stop Checking. Start Walking Out.
01
Date Night
Relaxed hands. The final mirror check is already over.
02
Work
A cleaner line beneath ordinary workplace clothing.
03
Weddings + Photos
Ready for the camera without hiding behind someone.
The rotation that makes sense
One To Wear. One To Wash. Pay For One.
£50£25
Buy one Foundation Singlet and get the second free. No code required.
Get 2 For £25Measure the two places that matter
Do Not Size Down.
- 01
Measure Your Chest
Run the tape around the fullest point, level across your back.
- 02
Measure Your Stomach
Measure around the widest point without sucking in.
MLXL2XL3XL4XL5XL
Choose the size that gives firm, even compression without pain, bunching or restricted breathing.
Find My Foundation Singlet SizeNot every tight shirt is shapewear
Control Beats Covering Up.
Approach
Under Rig
Elastic Tank
Sized-Up Shirt
Under Rig
Elastic Tank
Sized-Up Shirt
Primary jobEngineered shirt fitUniform compressionConceal through volume
Chest + torsoZoned controlOne tensionNo shaping
Shoulder lineIntegrated tensionNot the purposeLooser silhouette
Outer-shirt resultCleaner fitted lineVaries by garmentBaggy collar + sleeves
Straight answers
Before You Put It Under Your Shirt.
What does the Foundation Singlet do?
It creates immediate cosmetic torso shaping and a cleaner shirt fit while worn.
Will it make my stomach look flatter?
It is designed to hold the stomach closer and smooth the sides beneath compatible clothing while worn.
Does it control chest fullness?
Yes. The upper-torso construction is designed to reduce visible chest projection beneath shirts while worn.
Will people see it under my shirt?
The low neckline, deep armholes and smooth construction are designed to stay discreet beneath compatible T-shirts, polos and button-ups.
Should I size down for more compression?
No. Choose the size that gives firm, even compression without pain, bunching or restricted breathing.
Does the posture effect last after removal?
No. Integrated shoulder tension cues the shoulders back while the singlet is being worn.
Is this a subscription?
No. The Foundation Singlet is a one-time purchase.
How does the BOGO offer work?
Add the two-singlet offer to cart. One is charged at £25 and the second is free. No code is required.
The final decision
The Body Doesn't Change. What The Shirt Shows Can.
Buy 1. Get 1 Free - 2 Foundation Singlets for £25.
Get My Foundation Singlets