BUY 1, GET 1 FREE — 2 FOUNDATION SINGLETS FOR £25. NO CODE.
UNDER RIG Men's invisible compression gear

CONTROL WHAT YOUR SHIRT SHOWS.

HIDE GYNO. FLATTEN THE GUT. FIX THE SHIRT FIT.

Controlled same-shirt comparison showing the visible fit difference while the Foundation Singlet is worn underneath

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.

The Foundation Singlet holds your chest, stomach and sides closer, then cues your shoulders back for a cleaner, stronger-looking line beneath the same shirt — while worn.

Flatter chest Flatter stomach Smoother sides Stronger-looking line

CONTROL WHAT YOUR SHIRT SHOWS.

HIDE GYNO. FLATTEN THE GUT. FIX THE SHIRT FIT.

The Foundation Singlet holds your chest, stomach and sides closer, then cues your shoulders back for a cleaner, stronger-looking line beneath the same shirt — while worn.

Controlled same-shirt fit proof

Flatter chest Flatter stomach Smoother sides Stronger-looking line

THE FOUNDATION SINGLET

4.8 · 5482 REVIEWS

Invisible compression gear built for the areas your shirt exposes.

Choose your Foundation Singlet pack

Do not size down for more compression. Measure your chest and the widest point of your stomach, then use the larger measurement.

Not sure? Check the size steps
£50 £25 You save £25 £12.50 per singlet

2 FOR £25 · ONE-TIME PURCHASE · SECURE CHECKOUT — £25

BLACK + WHITE · M-5XL · SIZE HELP

CONTROLLED SAME-SHIRT FIT PROOF

SAME MAN. SAME SHIRT. ONE CHANGED VARIABLE.

Inspect the front, side, back, shoulders and waistband.

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.

Matched front comparison showing a flatter chest and cleaner shirt front with Under Rig

Chest projection is held closer so the same shirt reads flatter through the front.

Three-state shirt comparison showing fitted exposure, an oversized workaround and a cleaner Under Rig result

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.

Chest

Hold chest fullness closer so the shirt front reads flatter while worn.

Stomach

Reduce forward projection so the outer shirt drops with less clinging.

Sides

Smooth the line above the waistband without changing the outer-shirt size.

Shoulders

Cue the shoulders back for a cleaner, stronger-looking upper-shirt line.

CHOOSE MY SIZE
Exact front view of the black Foundation Singlet Exact three-quarter view of the black Foundation Singlet
Chest control Stomach control Side control Shoulder tension Longer torso

ENGINEERED UNDER THE SHIRT

CONTROL WHERE THE SHIRT NEEDS IT. DISAPPEAR WHERE IT DOESN'T.

CoreLock torso control holds the chest, stomach and sides closer. Integrated shoulder tension cues the shoulders back. The low scoop, deep armholes and longer torso keep the system beneath compatible clothing.

CoreLock torso control

Chest, stomach and side control work across the complete shirt line.

Integrated shoulder tension

Cues the shoulders back for a stronger-looking upper-body line while worn.

Low scoop neckline

Built to sit beneath compatible crew-necks and open collars.

Deep armholes

Designed to stay concealed beneath everyday sleeves.

Longer torso

Extends below the waistband to maintain coverage beneath the outer shirt.

Structured stretch

Firm compression construction across the chest, stomach and sides.

CHOOSE MY SIZE

DISCREET BENEATH COMPATIBLE SHIRTS

THE RESULT SHOULD SHOW. THE SINGLET SHOULDN'T.

A low neckline, deep armholes and longer coverage are designed to keep Under Rig beneath the outer shirt. Visibility still depends on the shirt's colour, fabric, neckline and fit.

Foundation Singlet concealed beneath a fitted T-shirt

T-shirt

Clean neckline. No visible hem.

Foundation Singlet concealed beneath an everyday polo shirt

Polo

Smoother chest and stomach beneath workwear.

Foundation Singlet concealed beneath a button-up shirt

Button-up

Cleaner buttons, waistband and shoulder line.

CHOOSE MY SIZE

GET THE CONTROL RIGHT

CHOOSE YOUR NORMAL SIZE.

Do not size down for more compression. The right size should feel firm and even, with full torso coverage and no painful cutting or restricted breathing.

Available sizes: M, L, XL, 2XL, 3XL, 4XL and 5XL.

1. Start with your normal size

Choose the size you normally wear in a fitted top. Do not size down for extra compression.

2. Check both measurements

Measure the fullest part of your chest and the widest point of your stomach with the tape level.

3. Use the larger area

If one area sits closer to the next size, choose for that larger area rather than forcing more pressure.

Correct fit

Firm, even pressure and full torso coverage without painful cutting or restricted breathing.

RETURN TO THE SIZE SELECTOR
Exactly two black Foundation Singlets presented for the Buy One Get One Free offer

CURRENT CORE OFFER

2 FOUNDATION SINGLETS. ONE TO WEAR. ONE TO WASH.

Buy one Foundation Singlet and the second is automatically free. Both units use the size and colour selected in the buy box.

2 FOUNDATION SINGLETS — £25 TOTAL £12.50 each · one-time purchase · no code

One to wear

Choose Black or White after selecting your size.

One to wash

The free second singlet uses the same selected size and colour.

CHOOSE MY SIZE

FAQ

THE QUESTIONS THAT MATTER BEFORE YOU CHOOSE A SIZE.

Does it remove gynecomastia?

No. It does not remove or treat tissue. It holds chest fullness closer to reduce visible projection beneath compatible shirts while worn.

Does it flatten my stomach?

It holds the stomach closer to create a cleaner front and side profile beneath compatible clothing while worn. Results vary by body and fit.

Does it smooth love handles?

Side compression and the longer torso are designed to create a smoother transition above the waistband while worn.

Does it correct posture?

Built-in shoulder tension cues the shoulders back for a stronger-looking shirt line while worn. It does not permanently correct posture.

Will people know I am wearing it?

It is designed as a discreet base layer. Visibility depends on the neckline, colour, thickness and fit of the outer shirt.

Should I size down?

No. Choose your normal size and account for the larger of your chest and stomach. Sizing down can create excessive pressure and an incorrect fit.

Is the change permanent?

No. Under Rig changes how your body and clothing look while worn. It does not remove tissue, cause fat loss or permanently reshape the body.

Is this a subscription?

No. The Foundation Singlet is a one-time purchase.

Australian man walking through an apartment doorway in a fitted shirt with a clean Under Rig result

THE FINAL DECISION

THE BODY DOESN'T CHANGE. WHAT THE SHIRT SHOWS CAN.

The Foundation Singlet holds the chest, stomach and sides closer, then cues the shoulders back for a cleaner-looking line beneath compatible shirts while worn.

2 FOUNDATION SINGLETS — £25 TOTAL £12.50 each · one-time purchase · no code

CHOOSE MY SIZE