Technical details
Open Accordion
Size + fit
Open Accordion

We shot the Black Light T Shirt on adventurer and explorer Aldo Kane who is 5ft 9 / 175cm and wears size medium.

The t shirt is incredibly stretchy so can easily fit most body types. But it’s also quite slim fitting. So if you like to get a bit of airflow between your skin and your t shirt we definitely recommend going a size up.

For more advice on sizing, check our size guide or ask us for help with sizing. And don’t worry if you order something and it doesn’t fit – we have a free, no hassle 30 day return and exchange period.

Arm length57-6060-6363-6666-69
Back length59-6262-6565-6868-71
Arm length23-2424-2525-26.526.5-27.5
Back length23.5-24.524.5-2626-2727-28

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It looks completely stealth during the day

By day the t shirt is the same subtle blend of matt black hues as a Stealth Bomber. We wanted it to look cool, unobtrusive, and not like you’re wearing high vis gear at all. So everything is matt black, from the Italian materials and stitching to the black glass dots. While the reflective dots kick into life when you shine light at them at night, the rest of the time you won’t really notice them as they’re flush to the material and have a matt, rubberised finish.

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How we use black glass to emit light

Most high vis gear uses ugly thick silver reflective tapes or stripes. Ours doesn’t. We’ve custom made thousands of super-thin matt black dots that reflect light back at any source. The science behind them is simple. Each dot has over 60,000 microscopic black glass spheres embedded in its surface. You can’t see or feel the glass though. Each dot is soft, flat, flexible, completely smooth to the touch and weighs a fraction of a gram.

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Reflective dots transform it at night

The t shirt remains matt black at night until light falls on it. Whether it’s car headlights, a torch or a helicopter search light, the t shirt’s 16 reflective dots transform from matt black into glowing discs of bright white light. The dots are all positioned on the parts of your body that move the most – like your elbows, wrists, shoulders and hips – so that when they light up they create a pattern that’s instantly recognisable as a person from any angle.

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8 dots of light is all you need to see a person

Colour is useless in the dark as our eyes can’t see it. Instead our brain’s ‘pattern recognition system’ takes over. So we’ve designed our pattern of dots based on the science of seeing someone at night. Experimental psychologists have shown how just 8 dots of light surrounded by complete darkness are all the information our eyes and brain need to understand we’re actually looking at a person. Our brains are so good at it, that in 0.25 of a second we can predict what they’re doing, where they’re going and how fast.

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Built from two of the lightest materials on earth

Built from two ultra-lightweight high-performance Italian materials, the Black Light T Shirt weighs just 85 grams. So it’s perfect for the hardest training or racing as it feels like it’s barely there. The back and sleeves are made from a high-wicking soft mesh fabric. It’s lightning fast to dry as you sweat, thanks to its fast-dry finish and mesh construction. The chest panel has the same high performance but we made it a fraction thicker so it doesn’t cling.

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Soft and stretchy, it's the opposite of most high vis gear

We wanted to make it the exact opposite of heavy and crinkly high vis gear. So we chose materials that weren’t just extraordinarily lightweight and breathable, but also feather-soft on your skin. The result is a t shirt that’s silent when you’re running in it. We’ve also used high stretch materials with 25% elastane, so every square centimetre of the shirt stretches. Every t shirt is then constructed in Portugal using a mini flatlock stitch to make all the seams smooth and flat.

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