Mountain Equipment Kryos Men's Jacket

The perfect balance of warmth, protection, and lightweight design, this down-insulated jacket is specifically designed for winter alpine climbing and super alpinism in the world’s greater mountain ranges.

The Kryos was developed with input from some of the world’s top Alpinists, climbers who were increasingly pushing the boundaries of lighter jackets to conquer higher and more technical routes, aiming for reduced weight and pack size despite increasingly narrow margins. Through extensive research and development, and leveraging their insulation expertise, the aim was to create a jacket that would meet the demanding requirements of the toughest routes at altitudes of 6,000m and 7,000m, as well as the biggest modern Alpine winter lines, while providing significantly greater warmth and protection.

The key to this achievement was the creation of the FIRESTORM™ construction. This includes the use of a drop outer WINDSTOPPERⓇ shell, which dramatically reduces heat loss while offering enhanced weather protection—crucial for the most challenging routes. Beneath this, a hybrid design of stitch-through and pleated baffles is employed, optimised to deliver maximum loft and warmth from the 234g of goose down.

As Uisdean Hawthorn remarked after testing the final prototype of the Kryos on Pakistan’s Koyo Zom: ‘I was genuinely surprised by how much warmer this jacket was in real mountain conditions compared to anything I’ve used before… It’s significantly less bulky than other jackets, making it easier to second in after long belays.’

The Kryos has been part of numerous significant ascents, including Paul Ramsden and Tim Miller’s Piolet d'Or-winning first ascent of Jugal Spire, Tom Livingstone and Matt Glenn’s first ascent of the North East Pillar of Tengkangpoche, Freja Shannon’s multiple hard first ascents in Arctic Norway, and Uisdean Hawthorn’s Piolet d'Or-winning first ascent on Mount Robson’s Emperor Face.

Features

Insulation

• 234g [size large] of Goose Down with a minimum content of 90/10 800 fill power provides exceptional insulation with low weight and pack size.
• Insulation is optimized using a baffle-by-baffle approach to ensure maximum warmth for the weight of down.
• Down sourced through DOWN CODEX© and the RDS 3.0 standard for animal welfare.
• Unique DOWN CODEX© code in each product shows where that batch of down has been sourced from as well as giving precise down content and fill power figures.
  
  

Materials

• DRILITE LOFT 30D outer fabric is totally windproof and weather-resistant, with a PFAS-free DWR.
• Ultralightweight and breathable 10 Denier lining gives exceptional moisture transfer, comfort and packability.
  
  

Patterning & Design

• FIRESTORM Construction: Hybrid baffling combines both conventional stitched-through and pleated baffles with a Drilite Loft shell to give maximum warmth and protection for the minimum weight and pack size.
• Up to 20% greater warmth with up to 20% lower weight with far lower water and wind ingress.
• Designed to be worn comfortably over other alpine climbing layers when required.
  
  

Hood Configuration

• Super Alpine HC Hood optimised for use with or without a helmet, designed to offer exceptional comfort and protection over a helmet and other hoods during extended use.
• Halo neck collar, similar to that found in sleeping bags, reduces heat loss.
  
  

Pocket Configuration

• 2 zipped handwarmer pockets and 2 chest pockets give access to essentials.
• 2 large inner drop pockets store gloves, water bottle and other items that need to be kept warm.
• Centre Front Zip
• 2-way YKK® moulded centre front zip with lightweight offset rear baffle to minimise heat loss and wind ingress.
• Easy to use with gloves on
  
  

Cuffs & Sleeves Configuration

• Elasticated cuff construction for ease of use with gloves and perfect seal to maximise warmth.
• Sleeves designed to offer unhindered mobility when climbing in all your layers.
  
  

Waist & Hem Construction

• Dual tether hem drawcords provide adjustment and increase thermal efficiency
  
  

Further Features

• Lightweight stuff sack is supplied
• Designed and developed in the UK. Manufactured in China
• Built to last. Backed up by our Product Lifetime Guarantee
• Mountain Equipment is a member of the Fair Wear Foundation

Specifications

Technology

	Down 800 The finest quality goose down, sourced from Ukraine, with a guaranteed minimum down cluster content of 90%.Each batch is individually tested during the filling process to ensure a minimum fill power of 800.DOWN CODEX approved.
	Down Codex® The DOWN CODEX® is a highly acclaimed certification programme, recognised with multiple awards, which addresses the environmental, ethical, and animal welfare aspects of down supply chains.It is based on thorough and transparent auditing processes that guarantee both traceability and quality.
	Firestorm The Firestorm construction combines the benefits of stitch-through designs – offering enhanced freedom of movement and reduced weight – with the added protection of a fully separate GORE-TEX INFINIUM™ outer fabric, improving weather resistance.The result of extensive research and development, it is featured only in the brand's highest-performing down products and has been proven on some of the world’s most challenging mountains and routes by climbers such as Tom Livingstone, Nick Bullock, Paul Ramsden, and Chantel Astorga.
	GORE-TEX WINDSTOPPER® GORE-TEX WINDSTOPPER® fabrics blend multilayer membrane technology with high-performance textiles to create materials that are windproof, highly breathable, and exceptionally resistant to rain and snow.The hallmarks of WINDSTOPPER® are its weather resistance, protective qualities, and superior comfort

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