The Firefly Jacket

A high performance, five-layered, weatherproof shell built with two colour-shifting membranes.

$795.00
Size

Model is 5ft 11 / 180cm with a 38 inch / 97cm chest, and wears size Medium.

  • A 400 gram jacket built with 5 layers of technology
  • Constructed with fluorescent and phosphorescent membranes
  • Waterproof and windproof, with high spec detailing

The Firefly Jacket is a high performance, five-layered, 400 gram, waterproof and windproof shell built with two colour-shifting membranes. Normally we like to say what colour the piece of clothing you’re buying is. But with The Firefly Jacket that’s not so easy. With one of the membranes infused with a phosphorescent compound, and the other built with a fluorescent compound, the jacket changes colour throughout the day and night as the light conditions change around it – so it can be anything from copper, to orange, to glow-in-the-dark green, to a yellow that’s so trippy under UV light that you look like you’ve wandered off the set of Avatar.

Of course this kind of multi-layered luminescence has been found in nature long before we existed. Possums, sharks, frogs and flying squirrels have been flexing biofluorescent fur and skin for millions of years. But you won’t find it in clothes… until now.

Built to be worn in any conditions night or day, the jacket is fully seam sealed, all the zips are waterproof, and you’ll find Velcro straps on both the cuffs that can be fastened tight in heavy rain. There’s an elasticated drawcord at the waist, and a hidden elasticated drawcord in the hood, both of which can be tightened at high speed. And the two large side pockets are protected by storm flaps that curve down at the bottom to help rain roll straight off.

Technical Details

Constructed from a 5-layer fabric
Jacket weighs 400 grams
Constructed with fluorescent and phosphorescent membranes
Waterproof and windproof
Fabric is 100% polyamide
Taped internal seams
2 way front zipper with waterproof tape
2 waterproof side pockets
Zipper pulls click into place
Velcro straps on sleeve cuffs
Elasticated drawcord with rubber stopper in waist
Hidden elasticated drawcord with rubber stopper in hood
Articulated sleeves
Bonded eyelets for drawcord in the hood
Fabric made in Italy
Cold hand-wash only
Constructed in Romania
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A high performance, weatherproof, colour-shifting shell

The Firefly Jacket is a high performance, five-layered, 400 gram, waterproof and windproof shell built with two colour-shifting membranes. Normally we like to say what colour the piece of clothing you’re buying is. But with The Firefly Jacket that’s not so easy. With one of the membranes infused with a phosphorescent compound, and the other built with a fluorescent compound, the jacket changes colour throughout the day and night as the light conditions change around it – so it can be anything from copper, to orange, to glow-in-the-dark green, to a yellow that’s so trippy under UV light that you look like you’ve wandered off the set of Avatar.

The Firefly Jacket is a high performance, five-layered, 400 gram, waterproof and windproof shell built with two colour-shifting membranes.

Built with multi-layered luminescence

Of course this kind of multi-layered luminescence has been found in nature long before we existed. Possums, sharks, frogs and flying squirrels have been flexing biofluorescent fur and skin for millions of years. But you won’t find it in clothes… until now. So this is the first chance for humans to get in on the action.

The Firefly Jacket is built with two colour-shifting membranes – one phosphorescent, the other fluorescent.  

Engineered from 5 ultra-thin layers

Just to build a jacket with just one colour-shifting membrane is really complex. You have to sandwich the ultra-thin membrane between two equally thin layers of mesh. Make the mesh too thick, and the membrane won’t be able to absorb or re-emit light. Make them too thin and the jacket will fall apart. So building a high performance jacket with two colour-shifting membranes has taken years of R&D, and requires 5 ultra-thin layers.

2 membranes. 1 phosphorescent. 1 fluorescent

The Firefly Jacket is built from a single fabric made from 5 ultra-thin, alternating layers. Layers 1, 3 and 5 (the outer layer, middle layer and inner layer) are a translucent, polyamide mesh. Layers 2 and 4 are the two colour-shifting membranes – one phosphorescent, and the other fluorescent. The phosphorescent membrane lets the jacket glow in the dark at night. The fluorescent membrane reacts to both visible and invisible light to change the colour of the jacket during the day and night.

The Firefly Jacket changes colour throughout the day and night as the light conditions change around it.

In bright sunlight it turns orange

The second you turn the lights on, or the clouds clear, The Firefly Jacket turns orange. The fluorescent and phosphorescent membranes both absorb and re-emit UV light from the sun. So the brighter the sunlight, the brighter the orange.

At night it glows green… or yellow

Charge it up at night by lighting it up with your car headlights or a high-powered torch and it will glow green like kryptonite. And under a blacklight at night the jacket turns fluorescent yellow.

Possums, sharks, frogs and flying squirrels have been flexing biofluorescent fur and skin for millions of years. But this is the first chance for humans to get in on the action.

You can write on it with any light

To see just how responsive the phosphorescent membrane is at night, the simplest thing to do is go into a dark room and start writing on it using the torch on your phone against the surface of the fabric as if you were using a pen on paper. It will start glowing instantly and leave a trail of light. There is no time lag or warming up. The fabric reacts the moment light strikes it. The wider the beam the thicker the line – so a high-powered torch will create the coolest effects.

The science behind the glow

Fluorescent and phosphorescent materials absorb high-energy UV light that the human eye can’t see, and re-emit it as low-energy light that it can see. The only difference between the two of them is how long that process takes. Fluorescent materials re-emit light instantly, so you need a constant source of UV light to see them. Phosphorescent materials re-emit light over time, giving them a glow-in-the-dark effect that can last for seconds, minutes, or hours after the light source is removed. Thanks to the two different membranes, The Firefly Jacket does both. 

Size + Fit

The Firefly Jacket has a regular fit.

Size XS S M L XL XXL
Fits chest 83 - 90 91 - 98 99 - 106 107 - 114 115 - 122 123 - 130
Fits waist 71 - 76 76 - 81 81 - 86 86 - 91 91 - 96 96 - 101
Size XS S M L XL XXL
Fits chest 33 - 36 36 - 39 39 - 42 42 - 45 45 - 48 48 - 51
Fits waist 28 - 30 30 - 32 32 - 34 34 - 36 36 - 38 38 - 40