Quick Summary
The Rab Men’s Downpour Mountain Jacket is a rain jacket in Tempest Blue, size S. It is described as a trekking and travelling jacket with a regular fit, and the product details include Pertex Shield 2.5-layer fabric, 20,000 mm waterproof rating, 20,000 g/m² breathability, and a centre back length of 78 cm for Medium.
It also includes under-sleeve ventilation zips, a two-way adjustable hood with a stiff peak, and zipped hand pockets with storm guards. The stated weight is 352 g.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | Rab |
| Product type | Men’s rain jacket |
| Colour | Tempest Blue |
| Size | S |
| Fit | Regular fit, which may suit buyers who want room for layering. |
| Membrane | Pertex Shield 2.5-Layer |
| Waterproof rating | 20,000 mm |
| Breathability rating | 20,000 g/m² |
| Centre back length | 78 cm in Medium |
| Weight | 352 g |
| Features | Under-sleeve ventilation zips, two-way adjustable hood with stiff peak, zipped hand pockets with storm guards. |
What to Compare Before Buying
- Size: This jacket is size S. Check the fit against the wearer’s measurements and the layers likely to be worn underneath.
- Water protection: The stated waterproof rating is 20,000 mm. Compare that level with the conditions you expect to face.
- Breathability: The stated breathability rating is 20,000 g/m². Compare that figure if you want to balance rain protection with airflow.
- Weight: The jacket is listed at 352 g. Check whether that suits your packing and carrying preferences.
- Features: Hood adjustment, under-sleeve zips and pocket layout all affect day-to-day use, so compare them with how you plan to wear the jacket.
Who This Product May Suit
This jacket may suit buyers who want a waterproof layer for trekking or travelling, with a regular fit that allows layering. The combination of a stiff-peaked hood, ventilation zips and zipped hand pockets makes the feature set easy to assess against typical wet-weather use.
Before You Decide
Confirm that size S is the right fit, and check whether the regular cut leaves enough room for layering. Compare the waterproof and breathability figures with the level of weather protection and ventilation you want. If hood shape, pocket layout or the listed weight matter to you, make sure those details suit the way you plan to wear it.
Size and Centre-Back Length
The centre-back length provided is for a different size from this listing, so it should not be treated as the garment length for size S. If jacket length is important to the fit, check a measurement for size S.









