Rab
Rab Downpour Mountain Waterproof Pants (men's, size M, regular leg)
- Weight: 7/10 How much they add to your pack.
- Rain protection: 8/10 How well the fabric and seams keep out heavy, long rain, when new.
Hiking, treks and scrambles where you want light rain pants that pull on over boots and crampons
- Weight
- 271 g (M)
- Waterproof rating (HH)
- 20,000 mm
- Fabric
- 40D Pertex Shield 2.5-layer ripstop (97 gsm) with fluorocarbon-free DWR
- Seams taped
- Not published
- Breathability (MVTR)
- 20,000 g/m²/24h
- Leg zips
- Full
Where to buy
Cotswold Outdoor £105 In stock. Delivery £6.95. Black. Page size data lists M regular as available. Shown 15% off the £140 list price. Delivery £6.95, free over £125.
View at shop: Cotswold OutdoorRab £140 In stock. Free delivery. Black, M regular in stock.
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 7/10How much they add to your pack. 7: Better than most.
Rab lists 271 g for size M, in the 220-289 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
In short
Good for
- Hiking, treks and scrambles where you want light rain pants that pull on over boots and crampons
- Keeping as just-in-case rain cover in the pack for a storm (Rab calls them compact and quick to deploy)
- Steep, rocky ground where knee articulation helps
Strengths
- 20,000 mm hydrostatic head and 20,000 g/m2/24h breathability (Rab)
- 271 g in size M
- Full-length two-way zip: pull on over boots and crampons, or open for airflow
- Knee articulation and a hem with adjustment and snap closure
- 40D Pertex Shield ripstop with fluorocarbon-free DWR
Weaknesses
- 2.5-layer fabric at 97 gsm, against 133 gsm for Rab's 3-layer Firewall Mountain pants
- Part-elasticated waistband with drawcord only; Rab's Firewall Guide pants add brace attachment points
- Fabric is 40D, against 50D on Rab's 3/4-zip Downpour Pants
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.