Rab
Rab Downpour Mountain Waterproof Jacket (men's, size M)
- Weight: 7/10 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: 1/10 How much warmth the jacket itself adds. Most shells add little: wear a warm layer under them.
Hillwalkers and scramblers wanting a light, packable 2.5-layer waterproof for mountain days and steep ground
- Weight
- 353 g (M)
- Waterproof rating (HH)
- 20,000 mm
- Fabric
- Pertex Shield 2.5-layer, 40D face fabric
- Seams taped
- Not published
- Breathability (MVTR)
- 20,000 g/m²/24h
- Pit zips
- Yes
Where to buy
Alpinetrek £154.95 In stock. Free delivery. Size M in stock in Dark Pollen and Tempest Blue. Free delivery from £85.
View at shop: AlpinetrekRab £160 In stock. Free delivery. Size M in stock in Army and Dark Horizon.
View at shop: RabTiso £160 Out of stock. Blue, size M in stock. Free delivery over £50.
View at shop: TisoPrices 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 7/10How much it adds to your pack. 7: Better than most.
Rab lists 352.5 g for size M (shown as 353 g), in the 280-369 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: thin shell (adds almost no warmth) 1/10How much warmth the jacket itself adds. Most shells add little: wear a warm layer under them. 1: A real weak point.
Estimate from maker's specs
In short
Good for
- Hillwalkers and scramblers wanting a light, packable 2.5-layer waterproof for mountain days and steep ground
Strengths
- Weighs 352.5 g in size M, Rab's figure
- 2.5-layer Pertex Shield; Rab rates it highly for waterproofing and durability, and top marks for windproofing
- Pack-compatible pockets and a generous adjustable hood, says Rab
- YKK AquaGuard centre front zip with a chin guard
- PFAS-free fabric; Rab buyers call the fit true to size
Weaknesses
- Rab rates its breathability low, below the middling rating it gives the Firewall
- Rab gives lightness and pack size only middling ratings
- Weight is given for size M only
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.