The RAB Mythic Ultra 180 is a 2-season mummy-style down sleeping bag designed for lightweight backpacking and camping. It provides reliable warmth for spring to autumn trips, offering comfort down to +7°C for women and +2°C for men.
Inside the Mythic Ultra 180 you’ll find 900+-fill-power R.D.S. certified goose down, which delivers excellent warmth-to-weight performance. The super-lightweight 7D ripstop nylon shell and lining keep the bag durable yet minimal in bulk, and the integrated thermo-ionic lining technology (TILT) helps reflect stray body heat back for added insulation. Weighing just 0.44 kg, it falls into the superlight category for bags rated around 0°C, making it easy to carry on any trek.
Fill power (FP) is a way to measure down’s loft and insulating ability—higher FP means more air trapped per gram of down, so you stay warmer without extra weight. R.D.S. certification confirms the down is sourced responsibly. The 7D ripstop nylon uses very fine threads woven in a grid pattern to resist small tears, and the thermo-ionic lining is a reflective fabric layer that helps bounce your body heat back toward you.
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RAB says about the Mythic Ultra 180
The Mythic Ultra 180 redefines what it means to be ‘ultralight’. Using a world-first, heat-reflective fabric treatment called Thermo Ionic Lining Technology, this is premium protection for those counting every last gram designed and constructed by our in-house technicians on the back of 40 years of hard-won mountain expertise, the award-winning Mythic Ultra 180 is one of the world’s most advanced lightweight sleeping bags.Though constructed with an exceptionally light ripstop 7D outer and filled with high-loft 900+FP down, the really special part is the inner lining. This incorporates world-first Thermo Ionic Lining Technology (TILT), which adds a titanium coating to the fibres to reflect heat back towards your body, enabling it to significantly boost warmth without increasing weight, compromising breathability or sacrificing any features.Weighing just 400g, the stripped back insulation of our TILT-equipped Mythic Ultra 180 is the ultimate expression of performance without penalty.