Selecting the correct down jacket for the temperature range and intended adventure is essential for maintaining balanced warmth and comfort in cold environments. With so many Rab jackets available, each featuring different fill powers, fill weights, and construction methods, it can be tricky to know which one best suits your needs.
Compare Weight & Specs at a Glance
This guide breaks down the warmth levels and technical details of Rab’s current down range, helping you compare models at a glance. From ultralight options built for fast-moving alpine missions to fully waterproof expedition-grade insulation, we’ve listed key specs, including fill weight, fill power, and notable features, for each jacket.
We’ll also explain the key factors that determine warmth, Down Quality, Fill Weight, and Hydrophobic Treatments, so you can understand what those numbers really mean and choose the right balance of warmth, weight, and weather protection for your adventures.
What Affects the Warmth?
Generally the more down in a jacket (fill weight), the warmer it is going to be but this assumes the down is the same quality. However, down quality can vary significantly and is measured by its fill power. A higher fill power down will keep you warmer than a lower fill power. To make matters worse there are two widely recognised methods of measuring Fill Power... keep reading here.
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