Rab Mythic Ultra Jacket Frost shattered summits and sub-zero temperatures demand ambition, grit, and the warmest gear. The new Mythic Ultra gives you the best chance of success with its outstanding warmth-to-weight ratio. Combining heat reflective technology, 900FP down and a featherlight construction, it offers award-winning insulation in bitter winter conditions. Rab's goal was to create an alpine down jacket with their best-ever warmth-to-weight ratio. They set to work combining their advanced heat-retaining TILT technology with the lightest, strongest fabrics they could find, and the unbeatable warmth-for-weight of goose down. They also used a combination of baffles to maximise performance. Lightweight stitch through-baffles on the arms and hood give better mobility, and box-wall baffles around the core encourage the down to fully loft maximising heat-trapping. The baffles are offset, which distributes the down evenly around the core and reduces the chance of any col