Man wearing the Primer Compression Undershirt under an open shirt

Primer Compression Undershirt - Sweat-proof Shapewear White

White / M
£29.95
Sale price  £29.95 Regular price  £42.99
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Man wearing the Primer Compression Undershirt under an open shirt

Primer Compression Undershirt - Sweat-proof Shapewear White

£29.95
Regular price  £42.99 Sale price  £29.95
REDUCE UP TO 3 SIZES
SWEAT-PROOF COMFORT
INVISIBLE UNDER SHIRTS
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Size
Standard delivery
In-store pickup
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Description

Sharper Line, Better Posture, Stay Dry

The X-shaped CompressBand lifts your posture. The breathable mesh keeps you cool. By the time you walk into your meeting, you've forgotten you're wearing it.

A targeted band sits across your lower abdomen and shoulders, firming the middle and rotating your shoulders back to natural upright posture.

Sweat Stays In. Your Shirts Stay Crisp.

Anti-odour fibre absorbs perspiration before it reaches your outer shirt — no dark patches under the arms, no end-of-day smell.

A breathable mesh panel across the chest moves air with you. no overheating in the office, no stickiness on the commute.

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REDUCE UP TO 3 SIZES ON CLOTHES, NO SWEAT

The No.1 Tech Undershirt for daily confidence for real men! 100% sweat and odour proof.

WHY CHOOSE PRIMER TECH UNDERSHIRT?

Feels like a second skin with 360° support — tones your back, core and waist.

Worn daily by real men

Drag the slider to see the difference.

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NOW WITH

More than 24,000 happy customers!

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BUILT FOR ALL-DAY COMFORT

Engineered with a double-knit fabric that won't ride up, shift or bunch. Sits flat from the first meeting to the last call.
RIBBED BAND THAT WON'T ROLL OR BUNCH UP
SWEAT-PROOF BARRIER FOR YOUR SHIRT
HIGH-STRENGTH FIBERS, BUILT TO LAST YEARS
STAYS COOL ALL DAY, BREATHABLE FABRIC
WEAR ANY SHIRT, NO VISIBLE LINES

Frequently asked questions

Material & care
Materials: nylon and elastane. Recycled-paper labels.

Care: wash inside out at 30°C or cooler. Do not tumble dry.
Will it fit me?
The Primer Tech Undershirt is built for any man who wants a more relaxed, confident layer under his everyday shirts — whatever his build.

Fit runs true to size. If you're between sizes, we recommend going one size up for the most comfortable wear.
Can I wear it all day?
Yes. Made with breathable fabric and stretch elastane, it's built for all-day wear — from the office to weekend casual.
Who's it for?
Any man who wants a clean, comfortable layer under his everyday shirts.

The Primer Tech Undershirt sits flat against the body and gives a smoother line under formal or fitted shirts — adding an extra layer of comfort whether you're in the office, out for dinner, or travelling.

Equally good for men who want a more refined look under tailored shirts and for those who simply want the all-day comfort.
How does the 30-day trial work?
We're confident in the quality of every Primer Tech product — so every order comes with a 30-day trial.

Wear it. Wash it. Live in it. If it's not for you, we'll refund 100% of your money — no questions, no fine print.

We'll stay in touch by email during the trial to make sure everything's fitting right.

After the 30 days, you're still covered: any manufacturing defect or product issue within the first year means a free replacement, no fuss.

CUSTOMER REVIEWS