Seamless Active T-Shirt

Seamless Active T shirt, Anti Bacterial that offers ultra comfort, the texture of the fabric has a great soft and unrestrictive feel to it

(3 customer reviews)


Size Guide
Measurement Chart
Chest Width48515457
Full Length (shoulder to waist)72747678
Sleeve Length20212223
Sleeve Width (bicep)16171919

If you are unsure which size to order, may we suggest that you compare these product measurements to a similar garment you already own. To do this, place the garment on a flat surface and take all measurements from the outside. our measurements stated in the above chart are in centimetres unless stated otherwise.

Size Conversion Chart (Mens)
European (EU)EU 46European (EU)EU 48European (EU)EU 50European (EU)EU 52
European Collar (EU)EU 38European Collar (EU)EU 39European Collar (EU)EU 41European Collar (EU)EU 43
French Tops (FR)FR 46French Tops (FR)FR 48French Tops (FR)FR 50French Tops (FR)FR 52
International (INT)SInternational (INT)MInternational (INT)LInternational (INT)XL
Italian (IT)IT 46Italian (IT)IT 48Italian (IT)IT 50Italian (IT)IT 52
UK/US ChestUK/US 38UK/US ChestUK/US 40UK/US ChestUK/US 42UK/US ChestUK/US 44
UK/US CollarUK/US 15UK/US CollarUK/US 15.5UK/US CollarUK/US 16UK/US CollarUK/US 16.5
UK/US WaistUK/US 30UK/US WaistUK/US 32UK/US WaistUK/US 34UK/US WaistUK/US 36

Contact us
If you are not sure what size to order, why not email us on and our sales team will happily try and help you.

Returns or Exchanges
Don’t forget, with all items ordered you have 14 days to return for a refund of a size exchange, please make sure that all hand tags are attached, please try and return the item (s) in the same branded UP. clear bag.

Measuring yourself, hints and tips
To view our UP. size conversion chart and for hints and tips on measuring yourself please click here.

Designed with comfort, support, style, and environmentally friendly without any compromises. Our marl-coloured T-shirt has a slightly relaxed fit to it, to allow free movement during exercise or general day-to-day wear. All of our seamless styles are created in a single and continuous knitting process which means there are no seams, therefore you are free from ‘chaffing’ providing you with a much more comfortable and better-looking clean garment than other T-shirts

Fit: Fits True Size, made for movement, lightweight, breathable

Wear Advice: We advise to take next size up if you want a slightly looser fit, this garment fits to true size

Our delivery options may vary. View what's currently available at checkout. If the fit is not perfect, return it within 14 days, as long as it's unworn, unwashed and unaltered and the hand tag is still attached. For UK and US deliveries ONLY the totals you pay when you complete your order already includes all duties and taxes owed to local authorities, purchases outside of the UK and US may incur local taxes for which are the sole responsibility of the buyer to pay, if you refuse delivery for this reason Universal Performance will not accept responsibility under any circumstances.

Care: If and When you have to wash this garment, please think about the environment and wash cold. Max wash 30oC, Do Not Bleach, Do Not Iron, Do Not Tumble Dry, Wash with similar colours

Fabric: 70% Rec Polyamide, Rec 30% Polyester, Anti Bacterial 'Stays Fresh'

polygiene logo

Share your thoughts!

4.67 out of 5 stars

3 reviews



Let us know what you think...

What others are saying

  1. Premium level Gym shirt

    Lee (verified owner)

    What size did you buy? XL

    Ok so bought a Seamless active black gym shirt to see what all the hype was about, got to say I love it. Few reasons, the material feels quality but so light on, I am a 44″ chest so bought the XL and it fits like a glove. It is slightly longer than most which is brilliant as it doesn’t ride up in the gym when doing shoulders or bench press. Quickly my favourite gym shirt so bought a Red one too.
    Can’t wait for new season release as like the products a lot and doing good for the planet. A+

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  2. Brad

    What size did you buy? L

    Brought a black t – shirt, love it, perfect fit, very light, excellent gym t shirt, about to buy another!

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  3. Thumbs up from me

    Damien Goddard

    What size did you buy? L

    Great fit, probably the best work out t shirt I currently own. The material used is quality, you can see that no corners have been cut when making this. The no smell quality to this t shirt is also good, worn for a week and so far no body odour on it
    I bought the blue in large.
    Highly recommended 🙌🏼

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