Womens Downpour Mountain 2.5L Pants

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A dependable shell layer that balances breathability, protection, and weight.

Rab says: 

Compact in your pack and quick to deploy in a storm, the Downpour Mountain Pants are a staple on your kit list for demanding hikes, treks, and scrambles. Engineered with 2.5-layer Pertex® Shield and excellent knee articulation, they offer a finely tuned balance of low weight, mobility, and durability that’s ideal for tackling more technical terrain and unpredictable weather.

Our Verdict

The updated Rab Downpour Mountain 2.5L Pants sit in that sweet spot between all-day comfort and pack-ready insurance. At 265g (UK12), they’re light enough to disappear until needed, but the full-length side zips mean you won’t be fumbling them over boots mid-downpour, and they can be used to vent some heat on intense climes. The Pertex Shield fabric holds up well in prolonged rain, with enough breathability to avoid the boil-in-the-bag feel on steeper climbs.

Knee articulation is noticeably well-executed, allowing for movement across uneven or scrambling terrain. The waistband sits securely without feeling restrictive, though I wish for a simple pocket for quick-access items.

– Reviewed by Ultralight Outdoor Gear

Features

• We’ve used a 40D Pertex® Shield ripstop fabric that’s tough enough for all-mountain pursuits.
• Negotiate rock-scattered trails and steep scrambles with superb knee articulation.
• Full-length, two-way zip allows you to control airflow and pull the pants on easily over boots and crampons.
• Keeps bulk to a minimum around your waist with a lightweight part-elasticated waistband with drawcord.
• Pairs with a range of footwear thanks to the hem adjustment and snap closure.

Specifications

• XSmall (UK 08) weighs: 259g
• Small (UK 10) weighs: 262g
• Medium (UK 12) weighs: 265g
• Large (UK 14) weighs: 272g

Material & Construction

• 40D Pertex® Shield 2.5-Layer construction waterproof
• technology with fluorocarbon-free DWR (97gsm) HH: 20,000mm/MVTR: 20,000 g/m2/24hrs

Help & advice:

• MVTR and Breathability Explained
• What is Hydrostatic Head?