Mountain Equipment Xeros Men's Jacket

A super-lightweight and highly protective down jacket designed for tackling the most challenging modern Alpine routes.

Developed as part of an extensive research and development project alongside some of the world’s top Alpinists, this minimalist down jacket delivers maximum protection and warmth while maintaining the lightest possible weight and compactness. Its WINDSTOPPER® outer shell optimises insulation and weather resistance.

Features

Insulation

• This garment features 140g (size large) of premium Goose Down, with a minimum ratio of 90/10 and an 800 fill power, delivering outstanding warmth with minimal bulk and weight.
• Each baffle is carefully filled and arranged to ensure the highest possible thermal efficiency per gram of down used.
• All down is ethically sourced in accordance with the DOWN CODEX© and RDS 3.0 standards, which prioritise animal welfare.
• Every item includes a unique DOWN CODEX© tracking code that reveals the precise origin of the down, along with exact content and fill power details.

Materials

• The outer shell is constructed using WINDSTOPPER® by GORE-TEX labs Ripstop with an ePTFE membrane and a 10 Denier fabric, offering exceptional durability and resistance to harsh weather.
• Inside, an ultralight 10 Denier lining enhances breathability, promotes efficient moisture transfer, and contributes to comfort and compressibility.

Patterning & Design

• The FIRESTORM Construction employs stitched-through baffles and a WINDSTOPPER® shell, striking a fine balance between insulation, protection, and minimal weight.
• This design delivers up to 20% more warmth while reducing overall weight by up to 20%, with a significant decrease in water and wind penetration.
• The jacket has been engineered for comfortable layering over alpine climbing apparel whenever conditions demand.

Hood Configuration

• The Super Alpine HC Hood has been meticulously designed for seamless use with or without a helmet, offering superb protection and comfort throughout prolonged use, even when worn over other hoods.

Pocket Configuration

• Two zipped handwarmer pockets and one chest pocket provide easy access to essential items.
• Two generously sized inner drop pockets offer ideal storage for gloves, a water bottle, or any gear that benefits from staying warm.

Centre Front Zip

• A two-way YKK® moulded centre front zip is paired with a lightweight offset rear baffle to effectively limit heat loss and block wind penetration.
• The zip has been designed for smooth operation, even when wearing gloves.

Cuffs & Sleeves Configuration

• Elasticated cuffs ensure an effective seal and make the jacket easy to adjust while wearing gloves, helping to preserve body heat.
• Sleeves are tailored for full freedom of movement, supporting dynamic climbing motions without restriction.

Waist & Hem Construction

• Dual tether hem drawcords allow precise adjustment while enhancing overall thermal retention.

Further Features

• A lightweight stuff sack is included for compact storage.
• The shell fabric is produced by W. L. Gore & Associates in China.
• The product is thoughtfully designed and developed in the United Kingdom and expertly manufactured in China.
• This garment is made to endure and is supported by Mountain Equipment’s Product Lifetime Guarantee.
• Mountain Equipment proudly partners with the Fair Wear Foundation to uphold ethical manufacturing standards.

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.
	Fair Wear As a member of Fair Wear, Mountain Equipment is committed to implementing the highest standards of working conditions.
	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