Mountain Equipment Lightline Jacket - Men's Down Jacket, Black, Size S

When the temperature drops and the wind picks up on a high alpine route, the Mountain Equipment Lightline Jacket is the layer you reach for. Built for mountaineers and winter trekkers who demand reliable warmth without excessive weight, this jacket uses 90/10 pure goose down with 700 fill power to trap heat efficiently. The box-wall baffle construction eliminates cold spots, while the DRILITE® Loft outer fabric sheds light precipitation and blocks wind, keeping you dry and comfortable during long days in the mountains.

Key specifications

• Insulation: 90/10 Pure Goose Down with 700 cuin fill power, RDS certified
• Outer fabric: DRILITE® Loft 40D with DWR finish for water resistance
• Inner fabric: Supersoft 30D for next-to-skin comfort
• Construction: Box-wall baffle for even warmth distribution
• Hood: Adjustable, zip-off, and helmet-compatible for versatile protection
• Zippers: YKK® moulded centre front zip for durability and smooth operation
• Pockets: 2 zipped hand warmer pockets and 1 zipped internal security pocket
• Cuffs and hem: Adjustable cuffs and dual tether hem drawcords to seal out drafts
• Packability: Supplied with a stuffsack for easy transport
• Fit: Alpine fit, designed for layering without restriction

Why choose it

The Lightline Jacket delivers exceptional warmth-to-weight ratio, making it a trusted companion for cold-weather adventures. The combination of high-loft down, wind-resistant shell, and thoughtful features like a helmet-compatible hood and secure pockets ensures you stay warm, dry, and organized. Its packable design means you can stow it in your pack when not needed, and the durable construction stands up to rugged use.

Ideal use cases

• Winter mountaineering and alpine climbing
• Cold-weather trekking and backpacking
• Belaying in frigid conditions
• Everyday winter wear in harsh climates

Good to know

This jacket is filled with responsibly sourced down, certified by the Responsible Down Standard (RDS), ensuring animal welfare and traceability. The DRILITE® Loft fabric is not fully waterproof but provides excellent water resistance and breathability for active use. For size S, the fill weight is slightly less than the 296g specified for size L, optimizing warmth for smaller frames. Always follow care instructions to maintain loft and performance.