Rab Firewall Pants

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3 layered Pertex over-trousers that keep you dry, breathe incredibly well and are also capable of quickly ventilating heat.

Rab says: 

Stretch waterproof pants made with 3-layer Pertex® Shield fabric, offering breathability and complete wet weather protection. Providing essential range of movement for mountain ascents with a ¾ side zip for venting and easy pull on.

Our Verdict

My favourite feature of these over trousers is that they, unusually, have 3 zips along the ¾ length side opening.  This means that you can keep the bottom half of your legs zipped up, protected from the rain, while the top of the side zip can be fully opened, allowing you to dump heat quickly, yet still stay dry.  

Made from a 3-layer, 30 denier, Pretex waterproof shield and treated with a Fluorocarbon-free DWR these are rugged over trousers that will shrug off year-round mountain weather and are much kinder to the environment than other leading over trousers.

A small cord loop around the bottom hem of the legs means you can cinch the trousers around a book to keep the trousers tight in place in seriously bad weather.

The partially elasticated waistband is lined with silicone, which helps the trousers stay in position, a drawcord also helps get a nice tailored fit.   

– Reviewed by Ultralight Outdoor Gear

Features

• 3/4 length 2-way YKK® AquaGuard® side zips with internal storm guard and triple pullers
• Part elasticated, gripper waistband with drawcord
• Knee articulation for ease of movement
• Under-boot cord attachment loops
• Tethered hem drawcord adjustment

Specifications

• Small (30″ waist) weighs: 303g
• Medium (32″ waist) weighs: 312g
• Large (34″ waist) weighs: 322g
• XLarge (36″ waist) weighs: 330g
• XXLarge (38″ waist) weighs: 338g
• Weights based on regular leg lengths

Material & Construction

• 30D Pertex® Shield 3-Layer construction waterproof technology with fluorocarbon free DWR (120gsm) HH: 20,000mm/MVTR: 20,000 g/m2/24hrs
• Main: 100% Polyamide face with Polyurethane membrane and 100% Polyamide backer.
• Fit: Regular

Help & advice:

• Pertex Shield Technology Explained
• About Rab
• What is PERTEX Shield?
• Hydrophobic Down
• Responsible Down Standard
• Rab Sustainability and Responsibility