Crux
At Up and Under in Cardiff, UK, we stock a range of premium, high-performance products from Crux, a brand dedicated exclusively to mountaineering. Founded in 2002, Crux started with just five products and has since expanded its range to include sleeping bags, down jackets, hardshells and tents - all crafted with top-tier materials and components for optimal performance. With a focus on climbing and related activities, Crux creates specialized gear designed for serious adventurers who value quality and durability.
Crux was founded by Carol McDermott, a New Zealand-born climber and engineer with extensive alpine experience across the world, including the Andes, Himalaya and European Alps. Drawing from personal expertise, Carol designs each product and oversees all aspects of the company, ensuring every item meets the highest standards. Manufactured in small, trusted factories in Europe and the Far East, Crux gear is tailored for mountaineers who demand reliability in extreme conditions.
Crux
X1 Raid SL
The Crux X1 Raid SL is the superlight version of the standard X1 Raid. The SL models represent Crux's new signature “expedition” range – available only in gold with a big logo printed on the side. The SL uses a lighter 20 denier nylon face fabric that is laminated with their X-tex membrane, making it the lightest single-wall, condensation-beating tent. Crux only recommend the SL if weight is of absolute importance – for a saving of 250g, you get a tent that will only last half as long as the standard model.
Crux
AK37 -X RT
The AK37-X RT is a long-awaited addition to the Crux AK line. It is identical to the AK37, but has a floating/removable lid instead of a fixed one which adds 3-5 litres of additional capacity. It otherwise shares the distinguishing characteristics of the AK range - a 40% Kevlar® / 60% Cordura® fabric with a highly waterproof TPU lamination and a fully welded construction. A top-loading style, it features a roll-top closing system under the hood for complete waterproofness.
Crux
AK47 RT
The Crux AK47 RT is a super-tough rucksack that utilises a Kevlar-based fabric construction whilst weighing in at just under 1.2kg. This means it's it's built to withstand the knocks and scrapes of demanding climbs, but it won't slow you down. Hence the Crux 3G AK47 RT is a must have pack for the discerning Alpinist.
Crux
AK37 RT
The Crux 3G AK37 RT is an incredibly tough, yet lightweight rucksack made from a 40% Kevlar® and 60% Cordura® composition with a minimalist waterproof design. So you don't need an extra waterproof bag liner which adds weight and annoyance. With very few seams and composed with 40% Kevlar, this pack is likely to last you for ages and will thrive where most normal rucksacks will perish.
Crux
AK70 RT
The AK70 is a large expedition pack suitable for climbs in the Greater Ranges. It can manage a heavy payload of 28–35 kgs in tolerable comfort, but still remains light enough to be used for a summit push. Its large volume is ideal for stuffing bulky, frozen gear into. As well as being remarkably light for such a capacious pack, the AK70 is substantial enough to impart a feeling of solidity and security.
Crux
AK57-X RT
The Crux 3G AK57 RT takes the classic AK57 and gives it a fully waterproof body using welded seams, Kevlar fabric and a roll-top closure. The extendable floating lid allows an extra 5 litres space to put ropes etc when quick access may be necessary or your kit is frozen stiff and won't go back in your pack.
Crux
AK47-X RT
The Crux 3G AK47-X RT has most of the same great features as the Crux 3G AK47 RT, but with an added floating removable lid and a roll top closure under the hood. Perfect for when you have to huff in huge loads to a camp and then need to strip the sack back down to minimise weight - or when you want to ditch the lid but still have a waterproof rucksack without need for a liner.
Crux
X1 Strike
The Crux X1 Strike Tent takes the design of the X1 Raid but adds an extra pole. This adds slightly more rigidity to the tent but most importantly provides more space at headroom. The X1 Strike also offers more protection from the elements when the door is open, thus increasing comfort on longer trips. This is all achieved without increasing the footprint of the tent, so it still pitches easily in small spaces between boulders and is totally self-supporting for firm pitches on snow.
Crux
X1 Raid
The Crux X1 Raid is a simple and lightweight single-skin tent that can sleep two people. It's a conventional two pole, Bibler-style bivvy tent with a design that makes it great for serious high mountain use. It uses Crux's unique X-Tex fabric which uses a coating with activated carbon, this introduces a new and revolutionary means of managing condensation that's greatly superior to conventional breathable membranes.
Crux
X1 Assault
The Crux X1 Assault takes the 3 pole design of the X1 Strike mountain tent but adds an external porch for storage, cooking and thus increased comfort. The tent has a relatively small footprint so that it will pitch in small spaces between boulders but the addition of the porch means that although the body of the tent is fully self-supporting the porch will need pegging out making it less friendly for use on snow.
Crux
Torpedo 900
The Crux Torpedo 900 is a waterproof sleeping bag that's designed to make sure you sleep through the night on high altitude expeditions. Perfect for climbing Himalayan peaks within the 6000m to upper 7000m category, the Torpedo 900 is filled with the highest quality 850 fill Polish down for ultimate warmth to weight ratio. Thanks to its waterproof shell, you can sleep comfortably in this bag anywhere, whether that's in a tent, snow hole or on a ledge.
Crux
Torpedo 700
The Crux Torpedo 700 is a sleeping bag designed for summer mountaineering use in up to 6000m of altitude or 5000m for 4-season use. It uses the best quality, ethically sourced 850 fill down available to achieve superior warmth to weight ratio. This means that the bag is compressible and lightweight enough to carry in your pack on arduous climbs and trips. It has a comfort rating of -4C and lower limit of -11C (EN13537), meaning you can sleep in it anywhere, whether that be in a tent, snow hole, or ledge.
Crux
Torpedo 500
The Crux Torpedo 500 is a waterproof sleeping bag that will make sure you sleep through the night on demanding trips. It uses the best quality, ethically sourced 850 fill down available to achieve superior warmth to weight ratio. This means that the bag is compressible and lightweight enough to carry in your pack on arduous climbs and trips. It has a comfort rating of 0C and lower limit of -6C (EN13537), meaning you can sleep in it anywhere, whether that be in a tent, snow hole, or ledge.
Crux
X2 Storm Footprint
The Crux X2 Storm Footprint fits under the inner tent of the X2 Storm and will also completely cover the porch area.
Crux
X1 Footprint
The Crux X1 Footprint will fit under all Crux X1 tents. Perfect for if you use your tent a lot and want to increase its durability, or if your current footprint is damaged. Great for rocky ground or glacial moraines.