Gear Review | Rab Firewall Waterproof Trousers

While a waterproof jacket is probably the most important piece of your kit, you’ll be thankful of a good pair of waterproof trousers to give additional protection from the elements and keep you comfortable for longer.

If you’re serious about spending any length of time outdoors, then it’s essential to be prepared for wet weather. Even in the height of the summer season showers and persistent rain can be forecast (there’s a reason our countryside is so green and lush in the UK), and quickly turn a fine day out in the hills into a miserable slog if you haven’t packed your waterproofs.

While a waterproof jacket is probably the most important piece of your kit, you’ll be thankful of a good pair of waterproof trousers to give additional protection from the elements and keep you comfortable for longer.

So what do I want from a pair of waterproof trousers? Obviously they need to keep the wind and rain out, but in most cases they’d stay tucked up in my pack in hopes of fine weather, so need to be lightweight and packable. Once the heavens open, they need to be simple and quick to pull on, so long zips are important, and other features I’d look for in my waterproof trousers would be POCKETS! and vents or two-way zips.

How I tested the Rab Firewall Pants

I think I gave Rab’s Firewall Pants an extremely thorough testing, well beyond the usual realms of outdoor equipment testing. I rocked a pair of these waterproof trousers during the 19/20 season at Port Lockroy, Antarctica, and thoroughly put them through their paces, wearing them daily for around 12 hours at a time over the four months of our season.

In general, the conditions I experienced were relatively mild, given our extreme location; temperatures ranged between -7°C and + 15°C, though winds reached in excess of 40 knots on occasion, and we experienced days of persistant heavy rain and occasional blizzard conditions. 

Our daily routine mixed high levels of physical activity, changing through the season from shovelling snow and cutting paths and steps, to scrubbing guano and sluicing rocks with buckets of water hauled up from the shore, with time engaging with visitors to Base A, the first permanent British base on the Antarctic Peninsula, now operating as a living museum. 

As the wildlife monitor I also had the additional task of counting penguin nests, which involved lots of bending and kneeling, avoiding pecks and pokes from curious penguins, and occasionally crawling into guano-filled spaces under buildings.

Product description

The Women’s Firewall Pants are waterproof trousers with a degree of stretch, made using Pertex Shield® 3-layer fabric. Rab claims this makes them ideal for use in alpine or winter conditions where freedom of movement is essential.

The Firewall Pants are designed for active use in mixed environments, with 3/4 length fully waterproof YKK® AquaGuard® 3-way side zips to allow for high levels of breathability. The trousers have a part elasticated gripped waistband and knee articulations for comfortable movement.

The trousers are compatible with winter boots with under-boot cord attachment loops, and a regular fit allows for a baselayer to be comfortably worn underneath. They weigh 296g (10oz).

The Firewall Waterproof Pants are also available in a men’s fit.

Field Results

Though the pants are lightweight, I found that the fabric was hardwearing and durable, and the regular fit gave plenty of room for additional layers worn underneath without being too flappy around my legs on windy days. I’d usually wear them over a pair of midweight softshell pants, with an extra pair of merino leggings on particularly cold days, though occasionally conditions were warm enough for shorts or lightweight leggings underneath during physical activity. 

The articulated knees, slight stretchiness in the fabric, and elasticated waistband meant I had little restriction of movement, which was exactly what I needed for my work, especially the penguin monitoring. The gripper strips in the waistband helped to stop the pants from slipping down as I moved around.

The long three-way zips on the outside of the leg made it easy to pull them on or off over my boots, and to vent at any position (the ideal position being just above the top of a long rubber boot, but not so low down that a penguin could nip the back of my knees).

The ankles have a shockcord to cinch the hem, and a loop to connect to bootlaces, so that they would remain secure while hiking, though I always wore rubber boots and didn’t make use of this feature.

With a limited supply of freshwater on the island, I could only keep them clean with seawater.  Though it was far from the ideal way to care for my kit, I had no problems with the taped zips seizing up with salt. Even with this abuse, they remained fully waterproof for the duration of the season.

Worth the money?

The Firewall Waterproof pants cost £135, putting them at the more expensive end of the range of products on offer. On a tight budget, you can find decent waterproof trousers for around £50, though you would compromise on features like breathability, venting, and ease of donning. However, the performance and durability of the Firewall pants make it a worthwhile investment.

Conclusion

I wasn’t too familiar with Rab products, previously only owning a pair of Gore-Tex gaiters, but the Firewall Waterproof Pants were well designed and comfortable, with several little touches that gave a very good performance in tough conditions. I wore my Antarctic pair to the absolute limit through the four month season, and will definitely be replacing like for like now I’ve returned to the UK.

Disclaimer: Rab provided the outdoor clothing that formed part of the uniform for UK Antarctic Heritage staff based in Antarctica for the 2019/20 season. This is my honest review after months of use.

If you’ve got any questions about finding the right waterproof trousers, leave a message in the comments below.
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