Reliable warmth for exposed mountain adventures

The Mountain Equipment Senja Jacket is a water-resistant, compressible mid-weight down jacket built with 195g (size 12) of 90/10 700 fill power duck down and a DRILITE® LOFT 40D shell for dependable insulation and weather protection. Designed for backpackers, mountaineers, skiers and everyday outdoor users, it balances warmth, packability and durability for mountaineering, Himalayan trekking and daily wear in cool or cold conditions. Its versatile layering fit and protective Mountain HC Hood make it equally capable on exposed summits, winter valley walks and mountain approaches.

Performance & Engineering

• Premium 700 Fill Power Down Insulation
  Engineered with 195g (size 12) of 90/10 duck down with 700 fill power, delivering a strong warmth-to-weight ratio for mountaineering, trekking and cold-weather outdoor use while remaining highly compressible for packing efficiency.

• Weather-Resistant DRILITE® LOFT Shell
  Built with DRILITE® LOFT 40D fabric, a PU coating, and a 1500mm hydrostatic head, providing complete windproof performance and dependable resistance to snow and light precipitation in exposed environments.

• Ethically Sourced Down Construction
  Designed using down certified through DOWN CODEX® and RDS standards, with a unique DOWN CODEX® tracking code that identifies the source, fill power and down content of each batch.

• Protective Mountain HC Hood
  Engineered with an insulated Mountain HC Hood, optimised for use with or without a helmet and designed to provide dependable protection from wind and challenging mountain weather.

• Packable Mountain Functionality
  Built with stitch-through baffle construction, a lightweight stuff sack and a layering-friendly fit that delivers warmth without excessive bulk, making it easy to carry and deploy during changing conditions.

Technical Specifications

• Ideal For: Mountaineering, Everyday
• Main Fabric: DRILITE® LOFT 40D shell with PU coating and 1500mm hydrostatic head; woven downproof 20D lining; 195g (size 12) of 90/10 700 fill power duck down
• Weight: 570g / 1 lb 4.1oz
• Hardware: 2-way YKK® moulded centre front zip
• Pockets / Features: Mountain HC insulated hood, 2 zipped handwarmer pockets, inner zipped security pocket, stitch-through baffle construction, adjustable elasticated cuffs, dual tether hem drawcords, supplied lightweight stuff sack, DOWN CODEX® and RDS-certified down
• Fit: Designed to be worn over base and mid-layers as required

Care & Longevity

Hand wash or machine wash at 30°C using a specialist down cleaner, then tumble dry on a cool setting to maintain loft and insulation performance. Store in a cool, dry place away from direct sunlight and avoid long-term compression when not in use. Always follow the manufacturer's care label instructions to preserve down performance and garment lifespan.