The Mountain Equipment Expedition Jacket M Size is the warmest off-the-shelf jacket in the Mountain Equipment range, designed for extreme cold-weather environments including 6000m-plus peaks and polar expeditions. Developed in consultation with leading expedition companies, it combines substantial down insulation with a full box wall construction for dependable warmth and long-term performance in serious conditions.

Built with DRILITE® Loft 30D fabric and 440g of 800 fill power goose down in size L, the Expedition Jacket provides a high level of insulation while maintaining protection against wind and moisture. Its carefully optimized baffle-by-baffle down distribution helps ensure effective use of the insulation throughout the jacket.

Key Features

• DRILITE® Loft 30D outer fabric
• Totally windproof and highly water resistant construction
• Full box wall baffle construction throughout
• Optimised down distribution and fill weights
• Baffle-by-baffle insulation approach
• Full Dome HC Hood with EXL lining
• 2-way YKK® moulded centre front zip
• Twin offset insulated rear baffles
• 2 zipped hand-warmer pockets
• 2 chest pockets
• Inner mesh water bottle pocket
• Large zipped mesh inner pocket
• DRILITE® Loft 30D inner hem and hood lining
• Adjustable cuffs
• Dual tether hem drawcords
• Weight: 1,095g / 38.6oz

DRILITE® Loft 30D Protection

The Mountain Equipment Expedition Jacket M Size uses DRILITE® Loft 30D for its outer fabric, providing a totally windproof and highly water-resistant shell. The same fabric is used for the inner hem and hood lining, creating a consistent construction suited to demanding cold-weather environments.

800 Fill Power Goose Down Insulation

The jacket contains 440g of goose down in size L, with a minimum 90/10 down-to-feather ratio and 800 fill power. This high-quality insulation is designed to provide substantial warmth for serious high-altitude and polar use.

Full Box Wall Construction

Full box wall baffle construction is used throughout the jacket. This construction allows the down insulation to occupy individual baffles without being compressed by through-stitching, supporting the jacket’s focus on maximum warmth.

Optimised Baffle-by-Baffle Insulation

Mountain Equipment uses an optimized distribution of down and fill weights across individual baffles. This baffle-by-baffle approach helps place insulation where it is needed while maintaining the overall performance of the jacket.

Full Dome HC Hood

The Full Dome HC Hood features an EXL lining and is designed for serious cold-weather use. The hood works as an important part of the jacket’s overall insulated construction for high-altitude and polar environments.

Insulated Centre Front Zip

A 2-way YKK® moulded centre front zip is combined with twin offset insulated rear baffles. This construction helps maintain the insulated structure around the front closure while providing practical two-way access.

Practical Storage

Two zipped hand-warmer pockets provide convenient storage and can be useful when additional hand protection is needed. Two chest pockets add further accessible storage, while the interior includes a mesh water bottle pocket and a large zipped mesh pocket.

Adjustable Cuffs and Hem

Adjustable cuffs allow the wrist openings to be secured according to fit and layering requirements. Dual tether hem drawcords provide further adjustment at the lower edge of the jacket.

Technical Specifications

Get the Mountain Equipment Expedition Jacket M Size

For demanding high-altitude and polar expeditions, the Mountain Equipment Expedition Jacket M Size combines substantial goose down insulation, full box wall construction, and DRILITE® Loft 30D protection in a purpose-built cold-weather design. Shop the Expedition Jacket from Backpackers Outdoor and prepare for serious mountain and expedition conditions.