A technical all-rounder ideal for cold days at the crag and winter walking, the Rab Nimbus Windproof Insulated Synthetic Jacket is a quick-drying insulated jacket designed to handle cold and damp environments.With a lightweight and windproof Pertex® Quantum fabric, the Nimbus Jacket can be worn as an outer or mid layer. Rab's Cirrus™ insulation lofts like down, with the wet weather insulating performance of a synthetic. Technical features include an over or under helmet hood with stretch binding and peak, front zip with insulated baffle, and elasticated cuffs to maximise warmth. With one zipped internal security pocket, and two zipped handwarmer pockets, the left side doubles as an integrated stuff sack which can be clipped to a harness or backpack.Lightweight and packable, the Nimbus Jacket is easy to care for and well suited to the damp, cold and changeable conditions experienced in the UK hills.
Features and Specifications
- Cirrus™ powered by 3M featherless insulation (233g/8.2oz in size L)
- Atmos™ 100% Nylon rip-stop lining
- Pertex® Quantum windproof outer fabric
- Insulation - Cirrus™:233g / 8.2oz
- 502g / 17.8oz
- Stitch-through mini-baffles
- Over or under helmet hood with stretch binding and peak
- YKK® VISLON® front zip with insulated baffle
- 2 YKK® zipped hand warmer pockets, left side doubles as integrated stuff sack
- 1 YKK® zipped internal security pocket
- Elasticated cuffs
- Hem drawcord
- Fit: Regular
Outdoor Gear Lab Top Pick Award - Men's Insulated Jackets
"The Rab Nimbus is the warmest insulated jacket that we tested for this review, and is therefore worthy of our Top Pick for Warmth. While it doesn't quite compare to heavy parkas or down jackets, there is no doubt that the thick, Cirrus "featherless" insulation that fills this baffled jacket traps the warmth your body creates. We loved wearing it as a belay jacket, and it was the first one we reached for when we needed to go on cold early morning dog walks and simply wanted to be as warm as possible. It is also one of the most affordable jackets we tested, and this fact, combined with how warm it is, make it an excellent budget alternative to a more expensive down-filled jacket."
Outdoor Gear Lab, 2019
Rab Men's Upper Body Measurement Chart
| S | M | L | XL | XXL | |
| Chest |
94cm 37" |
102cm 40" |
109cm 43" |
117cm 46" |
122cm 48" |
| Waist |
76cm 30" |
81cm 32" |
86cm 34" |
91cm 36" |
96cm 38" |
| Arm Length |
83cm 33" |
86cm 34" |
89cm 35" |
91cm 36" |
91cm 36" |
While all Rab garments are sized to these measurements, you will find that the cut on jackets designed for use in more extreme environments will be slightly more generous in the expectation that these designs will be used with additional/thicker mid-layers. If you plan on using a jacket like this with fewer layers beneath it, please keep this in mind when selecting your size.
Regular Fit for Garments
Designed to be versatile Regular Fit garments are not closely fitted making them ideal for cross-seasonal use and multi-layering. Regular fit garments are contoured, with room for movement.
Slim Fit for Garments
Slim Fit garments are designed to be worn closer to the body or over layers such as baselayers and light mid-layers. Slim fit garments are close fitting for maximum performance when moving dynamically.
Expedition Fit for Garments
Expedition garments are designed to be worn in colder conditions over more layers of clothing than our other fits and are oversized slightly to allow for this.