Rab
Rab Firewall Waterproof Jacket (men's, size M)
- Weight: 4/10 How much it adds to your pack.
- Rain protection: 8/10 How well the fabric and seams keep out heavy, long rain, when new.
- Warmth: 3/10 How much warmth the jacket itself adds. Most shells add little: wear a warm layer under them.
Hillwalkers and scramblers wanting a tough 3-layer shell with vents for mountain days in uncertain weather
- Weight
- 496 g (M)
- Waterproof rating (HH)
- 20,000 mm
- Fabric
- 40D Pertex Shield 3-layer (148 gsm), fluorocarbon-free DWR
- Seams taped
- Not published
- Breathability (MVTR)
- 20,000 g/m²/24h
- Pit zips
- Yes
Where to buy
Sportsshoes £143.99 In stock. Free delivery. Size M in stock, reduced from the £159.99 the shop shows. Free standard delivery on this item.
View at shop: SportsshoesRab £165 In stock. Free delivery. Size M in stock in Black; some other colours are out of stock in M.
View at shop: RabPrices checked 8 Nov 2026 on each shop's own page; shops can change them. We earn no commission on these links; shops are listed by price. More
Our ratings (out of 10)
1 to 10, compared with the whole market. Each says what it's based on. How we score
Weight
From maker's figures 4/10How much it adds to your pack. 4: A bit below average.
Rab lists 495.5 g (size M), in the 470-649 g band.
Rain protection
Estimate from maker's specs: hydrostatic head figure 8/10How well the fabric and seams keep out heavy, long rain, when new. 8: Clearly better than most.
Estimate from maker's specs
Warmth
Estimate from maker's specs: heavy 3-layer shell 3/10How much warmth the jacket itself adds. Most shells add little: wear a warm layer under them. 3: Below average. Fine for some trips, not others.
Estimate from maker's specs
In short
Good for
- Hillwalkers and scramblers wanting a tough 3-layer shell with vents for mountain days in uncertain weather
Strengths
- Rab says the robust 40D 3-layer Pertex Shield survives scuffs with rock and pack abrasion
- Rab rates it highly for waterproofing, durability and pack size, and top marks for windproofing
- YKK front zip with external and internal storm guards and snap closure for ventilation
- PFAS-free fabric and product
- One buyer likes the pit zips and packs it in a kayak
Weaknesses
- Weighs 495.5 g in size M, Rab's figure
- Rab gives lightness and breathability only middling ratings
- One buyer says the fit is a little small
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.