Technical details
Open Accordion
Size + fit
Open Accordion

We shot the 100 Year Shorts on trail runner, swimmer and surfer Aljoscha Fabregas who is 6ft 1 with a 31 inch waist and wearing size small.

If you’ve got our 100 Year Pants, you’ll find these shorts fit the same around the waist.

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.

XSSMLXLXXL
Fits waist71-7676-8181-8686-9191-9696-101
Outside length5455.55758.56061.5
Inseam length26.527.528.529.530.531.5
XSSMLXLXXL
Fits waist28-3030-3232-3434-3636-3838-40
Outside length21.622.222.823.42424.6
Inseam length10.51111.5121212.5
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An unbreakable pair of shorts that started life as pants

When we were developing the 100 Year Pants they were so hardcore yet so comfortable, we wondered what they’d be like if you turned them into shorts. No-one’s ever attempted to make an unbreakable pair of shorts before, and we had one of the toughest materials on Earth. The result is the ultimate pair of utility shorts whether you’re trekking, climbing, out in the woods or making a fire in camp. It doesn’t matter whether it’s cacti, branches, brambles, rocks or flames, there’s very little that can mess with a pair of 100 Year Shorts.

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Swiss-engineered material developed for the military

Just like the pants, our 100 Year Shorts are built entirely from a new military-grade fireproof fabric engineered in Switzerland that was invented to help soldiers handle the most extreme scenarios, but without having to dress like firefighters. It means the shorts are not only strong enough to wear in any terrain and emerge unscathed, but they’re actually comfortable enough to spend the rest of your life in.

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The material is made from three layers sandwiched together

If you looked at a cross section of the shorts you’d think you’re just looking at one layer of fabric. But just as you’d find with any high-performance jacket, it’s actually three separate layers sandwiched together and performing three distinct roles. The outer layer is a stretchy, windproof soft shell. The middle layer is a fireproof coating. And the bottom layer next to your skin is a soft, knitted fireproof fibre that feels like cotton.

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On the outside they feel like sweat pants

Even on its own the outer layer of the shorts would make the toughest pair of shorts you’d ever worn. Highly durable and abrasion resistant, it’s also water repellent, stretchy and windproof. Yet despite this it’s still super soft and feels nothing like any fire-resistant fabric that’s ever been made before. And that’s because it’s the two layers beneath that turn it from a tough pair of shorts to ones that can repel fire.

The middle layer acts like an airbag in a fire

Any contact with fire triggers the fireproof middle layer of the shorts. This layer instantly expands to 1000x its size to create a protective barrier between you and the flames. It might sound like an airbag, but it looks more like tiny plants growing at high speed as the protective layer increases in volume and expands to about 6mm in height. This video shows the expansion process. Even if you hold a flame on these shorts they can’t catch on fire, and flames simply can’t spread on them.

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The shorts feel like cotton next to your skin

It’s the inner layer of the shorts that keeps them together in an emergency. Built from an aramid fibre that can’t burn or melt, it’s there to protect the structural integrity of the shorts in a fire. While these kind of fibres are typically built for practicality rather than comfort, we’ve knitted them into a soft and ultra thin layer that feels more like cotton on your skin.

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Fireproofing the shorts makes them more breathable

While it’s completely counter intuitive, having a protective layer in the middle of the fabric makes the shorts more breathable. Because it’s created from a fireproof coating rather than material, it acts like a gap or fire break between the inner and outer layers of fabric, and it’s this invisible gap that lets air pass through the shorts and makes them more breathable.

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It will take more than 100 years to break the fabric

The Martindale abrasion resistance test is the way clothing is normally tested to see how quickly it will break down. A mechanical thumb rubs the surface of the fabric repeatedly until the fibres start to break. The test goes up to 100,000 revolutions which is the equivalent of a lifetime of wear and tear. A normal polyester fabric can survive around 25,000 revolutions. These shorts easily passed 100,000 cycles of wear, and even then the fabric had to be checked with a magnifying glass to see if any fibres had broken. None had.

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The shorts stretch in every direction

Despite being insanely tough, the shorts stretch in every direction and there’s no move you can pull where they’d restrict you. The entire shorts are made from the same high tech fabric with four way stretch. And every seam has been engineered to follow the way your legs move whether you’re climbing a mountain, setting up camp, or descending into a volcano for fun.

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The shorts are water repellent

The surface of the 100 Year Shorts is water repellent and fast drying, so a rain shower will just roll off them. If you’re out in heavy rain for a prolonged time, the three-layered construction of the fabric means that water will take much longer to get through than your average pair of shorts.

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Three side pockets to carry your gear

You’ll find two large side pockets on the 100 Year Shorts. And beneath the left pocket is a second concealed waterproof zipped pocket. While the lining in normal pockets is made out of cotton, the lining in ours is made from a stretch fabric with reinforced seams so your hand doesn’t end up going through them like it eventually does in normal shorts.

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A hidden pocket on the front right leg

On the front of the right leg you’ll find a fourth hidden pocket. The entrance is concealed beneath a miniature storm flap along the seam. It’s perfect for holding passports or other slimline objects you might need to hide away. 

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The seat of the shorts is designed to last 200 years

We’ve reinforced the seat of the shorts with two layers of material. The maths is pretty simple. If it takes at least 100 years to go through one layer, it should take 200 years of sitting to go through two. The single back pocket on the seat of the shorts fastens with two stainless steel press studs and a storm flap to stop anything falling out when you sit down or run.

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Even the waistband is custom engineered

The fly fastens with a zip, a stainless steel press stud with a rubberised cover and a second lockable press stud. The waistband has five belt loops, each with a small reinforced loop underneath for clipping on extra gear. The waistband is constructed from two layers of fabric that are bonded together for extra strength. We created tiny perforated holes in the layer of glue that bonds them together so the waistband can still stretch and air can still flow through it.

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The watch pocket can hold 550lbs and start a fire

The 100 Year Shorts come with a watch pocket just under the waistband. It’s fitted with a black nylon paracord loop that can hold 550lbs of weight without breaking – so you can clip anything you want onto it, from a flashlight to a compass. If you cut open the paracord you’ll find threads of kindling inside it, so if you’re out in nature, need to start a fire, and have nothing else to hand, this will help you do it.

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How we built a pair of shorts to last 100 years

Designing and building a pair of shorts that can last for 100 years is an exercise in no expense spared craftsmanship. And it’s as much about what you can’t see as what you can. While it starts with bespoke materials created in the most cutting-edge fabric mill in Switzerland, it’s followed by hundreds of separate construction processes – from hand testing every stainless steel snap fastener, to stitching every critical seam twice with a heavy duty thread, to reinforcing the lining of the pockets.

Inside the Schoeller factory in Switzerland

Built in the SpaceX of fabric mills

Every pair of 100 Year Shorts starts its life at the same space age factory in Switzerland. Based in the mountains, Schoeller is to material technology what SpaceX is to rockets – a bunch of people and machines quietly making the future happen faster. While fire resistant clothing has historically been based on heavy, uncomfortable, chemical laden materials, Schoeller created the world’s first intelligent material that can be worn everyday then alter its behaviour in the face of fire.

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