Rab
Rab Downpour Trail Light Waterproof Jacket (men's, size M)
- Weight: 10/10 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.
Summer hills and light backpacking where weight matters most (187 g in size M)
- Weight
- 187 g (M)
- Waterproof rating (HH)
- 20,000 mm
- Fabric
- Pertex Shield 2.5-layer, 20D face fabric, fluorocarbon-free DWR
- Seams taped
- Not published
- Breathability (MVTR)
- 20,000 g/m²/24h
- Pit zips
- No
Where to buy
Northern Runner £116.99 In stock. Free delivery. Anthracite, size M in stock, 10% off the £130 list price. Free 3-5 day Royal Mail delivery on all UK orders.
View at shop: Northern RunnerRab £130 In stock. Free delivery. Anthracite, size M in stock (Light Zinc/Anthracite is out of stock in M).
View at shop: RabBlacks £130 Out of stock. Light Zinc/Anthracite only. Size M is out of stock (XL and XXL are in stock). Free standard delivery over £95.
View at shop: BlacksPrices 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 10/10How much it adds to your pack. 10: The best you can buy for this.
Rab lists 186.5 g for size M (rounded to 187 g in the specs), under 280 g, band 5. Reviewers weighed 216 g in men's L and 172.5 g in women's size 10 (UKHillwalking), and Live For The Outdoors lists 172 g in women's size 10; Rab's M figure is banded.
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
What reviewers say (out of 10)
Ratings marked * are from reviews and are not part of the trip score. They are reviewers' scores, not our own measurements. How we score
Breathability*
Estimate: only 1 review about breathability (fewer than the 3 we need, so never above 8) 8/10How dry it keeps you from sweat on the move, uphill.
1 review on breathability, e.g. "we've found it comfortably un-clammy when worn on the move".
Hood*
Estimate: only 1 review about hood (fewer than the 3 we need, so never above 8) 6/10How well the hood fits, adjusts and keeps rain off without blocking your view.
1 review on hood, e.g. "does tend to catch and flap in the wind".
Durability*
Estimate: only 1 review about durability (fewer than the 3 we need, so never above 8) 6/10How well the fabric and waterproofing hold up over seasons of use.
1 review on durability, e.g. "the fabric does soon wet out slightly in heavy weather".
In short
Good for
- Summer hills and light backpacking where weight matters most (187 g in size M)
- Trail and fell running with a packable, stretchy 2.5-layer shell
- A just-in-case layer that packs into its own chest pocket
Strengths
- 187 g for size M (Rab's figure)
- 20,000 mm hydrostatic head and 20,000 g/m2/24 h breathability on Rab's page
- Packs into its own chest pocket (Live For The Outdoors measured about 16 x 11 cm)
- Hood with a stiffened peak, 180-degree side vision (Live For The Outdoors)
Weaknesses
- Rab doesn't say how the seams are finished, so rain protection is an estimate, not a reviewed score
- Thin 20D fabric wets out in heavy weather. Live For The Outdoors had water come in at the sleeves, zip top and seams after 10 minutes of intense downpour, and UKHillwalking had it forced through the front zip in wind-driven hail
- Slim running fit, one chest pocket, no pit zips and no hand pockets
- Sleeves run long (Live For The Outdoors)
- Weather protection and durability are estimates, not reviewed scores: fewer than 3 tests
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.
ShowHide sources (3)
- Rab UK: Men's Downpour Trail Light Waterproof Jacket (186.5 g size M, 20,000 mm)
- Live For The Outdoors: Rab Downpour Trail Light running jacket review (Kate Milsom, women's size 10)
- UKHillwalking: Rab Downpour Trail Lite and Phantom, ultralight shells for runners and backpackers (Dan Bailey and Sarah Jane Douglas, men's L and women's 10)