Rab Altus Jacket — This jacket is super lightweight, tough, and wind-resistant, making it ideal for mildly cold conditions. It can also serve as an additional layer during extreme cold spells.

The Altus jacket features a windproof design with quick-drying fabric made from Pertex® Quantum and natural goose down insulation to keep you cozy on chillier days. It conveniently packs into its own pocket with a loop for attaching it to a system, backpack, or more.

Features

• Water-resistant down that retains its thermal properties even when wet;
• YKK zippers with an insulating flap and elastic cuffs to keep you warm;
• Chin guard;
• Anatomical cut;
• Adjustable hem with a drawcord;
• Packs into its own pocket.

Specifications

• Material — 100% ripstop nylon;
• Insulation — 750 fill power;
• Membrane — Pertex® Quantum;
• Model — for men.

Technology

• Pertex® Quantum — is a fabric made from incredibly fine woven fibers offering high relative strength. The exceptional softness of this material allows down or synthetic insulation to fill the entire allocated space, while the dense weave prevents insulation fibers from migrating through the fabric.
• Fill Power — refers to the ability of a limited mass of down to occupy a specific volume. Physically, Fill Power represents the volume in cubic inches that one ounce of down occupies. The higher the Fill Power, the better the quality of the down. Outdoor gear typically has a minimum Fill Power of 550, with values at 650 and above considered good. High Fill Power down not only provides a large volume per unit of weight but also has a lower thermal resistance per unit thickness compared with standard values.

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