Rab Downpour Mountain 2.5L Jacket

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A lightweight waterproof that handles changing mountain conditions with confidence. Streamlined features and dependable fabric make it a reliable option for year-round hill use.

Rab says: 

When you need the lightness and packability of our Downpour range with a mountain-ready feature set, this protective waterproof jacket strikes the perfect balance. Designed with hardwearing, 2.5-layer Pertex® Shield, it gives you the confidence to tackle treks, scrambles, and steep terrain, knowing you’re equipped for any challenge. With pack-compatible pockets and a generous, adjustable hood, it’s a staple for all-mountain adventure.

Our Verdict

The Rab Downpour Mountain 2.5l Jacket keeps things simple but functional, with enough technical details to make it versatile across mountain days. It feels light at 375g (Medium) but substantial enough for serious use. The Pertex Shield fabric breathes better than I expected and sheds sustained rain well. Articulated sleeves and a generous cut in the shoulders allow for whole movement without pulling when reaching or scrambling.

The hood is easy to adjust with gloves, and the peak holds its shape in the wind. I was glad to see pit vents included this time—something I’ve missed on previous Downpour models. The pockets sit high enough to clear a hipbelt, a detail that makes a difference when carrying a rucksack, ideal for multi-day trips.

– Reviewed by Ultralight Outdoor Gear

Features

• 2-way adjustable hood with concealed internal cord locks and single handed adjustment with stiffened flexible polymer peak for added protection
• YKK® AquaGuard® centre front zip with chin guard for comfort
• YKK® AquaGuard® pit zips for efficient core ventilation
• Fully articulated sleeves for improved fit and comfort
• 2 YKK® AquaGuard® zipped A-line pockets
• Extended cuffs with hook and loop adjustment for fit with gloves or mitts
• Dual sided rear hem adjustment with single handed adjustment

Specifications

• Small weighs: 353g
• Medium weighs: 375g
• Large weighs: 401g
• XLarge weighs: 425g
• Fit: Regular
• Centre back length (SizeM): 78cm/30.7inch

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
• 100% Polyamide (Recycled) with Polyurethane membrane

Help & advice:

• Pertex Shield Technology Explained
• Time-Saver Guide to Choosing a Waterproof Jacket
• Time-Saver Guide to PFC Free
• Choosing a Shell Jacket
• About Rab
• GORE-TEX Pro Explained
• MVTR Breathability
• Hydrostatic Head
• Rab Sustainability and Responsibility