Rab Phantom Mountain Jacket | Ultralight 20K/20K Waterproof Mountain Jacket

Recommended use

• Fast hiking and light trekking
• Fast mountaineering and mountain activity on the move
• Premium emergency waterproof shell
• Routes where backpack space is very limited

Is it for you?

• ✔ Yes, if you are looking for an ultralight and very compact waterproof jacket for the mountains.
• ✔ Yes, if you are doing fast-paced activity and want a serious shell that takes up hardly any space.
• ✔ Yes, if you prioritize minimum weight without sacrificing real 20K/20K protection.
• ✘ No, if you need a more robust jacket for prolonged use and very severe conditions for days.
• ✘ No, if you are looking for a more comfortable, structured, or versatile shell for continuous use outside of fast-paced mountain activity.

Description

The Rab Phantom Mountain Jacket is an ultralight waterproof jacket designed for fast movement in the mountains, when backpack space and total gear weight are decisive factors. It does not aim to compete in robustness with a heavy, continuously used shell, but rather to offer real, compact, and serious protection for fast days, technical trekking, fast hiking, and alpine outings where it is advisable to carry a reliable waterproof layer without penalizing the load.

Its approach is clear: a shell with minimum weight, maximum compressibility, and 20,000/20,000 protection, designed to stay in the backpack until the weather really changes.

Real technical performance

At just 222g in size M, the Phantom Mountain Jacket falls into a very specific category within Rab: waterproof garments that prioritize speed, lightness, and ease of transport. The 30D Pertex® Shield 2.5-Layer fabric with Diamond Fuse technology provides a very interesting combination of low weight and greater abrasion resistance than other thinner fabrics focused solely on grammage.

Its figures of 20,000mm waterproofing and 20,000g/m²/24h breathability place it at a fully valid technical level for the mountains. In real use, it works especially well as a waterproof layer for intense activity, sudden weather changes, and traverses where you need a shell that you can always store in your backpack without thinking twice.

The value of this model lies in its balance: it is light, very compact, and technically sufficient for demanding mountains, but without becoming a heavy or oversized garment for those who prioritize speed and efficiency.

Description

The full-length front zipper allows for quick on and off when the weather changes, while the lightweight hood with minimalist adjustment and reinforced brim adds extra protection without adding unnecessary bulk. The articulated sleeve design promotes mobility and two lightweight hand pockets keep essentials close at hand.

In addition, it can be stored inside its own hood, reinforcing its role as a high-level emergency shell to always carry on fast routes, trekking or light alpine activity.

Comparison within the range

• Compared to the Downpour Mountain Jacket: the Phantom Mountain is notably lighter and more compact, more geared towards fast activity and always carrying in a backpack.
• Compared to the Firewall Light Jacket: it maintains a lightweight philosophy, but with an even more minimalist and portable approach.
• Compared to a more robust mountain shell: it prioritizes weight and compressibility over structural comfort or durability for continuous use over several days in bad weather.

Quantitative Technical Specifications (Rab Equipment)

• Fit: Regular
• Weight: 222 g / 7.8 oz (size M)
• Center back length: 75 cm / 29.5 in (size M)
• Waterproofness: 20,000 mm
• Breathability: 20,000 g/m²/24h
• Main fabric: 30D Pertex® Shield 2.5-Layer with Diamond Fuse, fluorocarbon-free DWR, 73 g/m²
• Product code: QWI-71
• Key features: stows inside hood, lightweight hood with minimalist adjustment, articulated sleeves, two lightweight hand pockets, elastic cuffs and low-profile rear adjustment