Rab Mythic Sleeping Bag Range Explained
May 02, 2024
With the highest warmth-to-weight ratio in the Rab range, the Mythic sleeping bags are optimised for moving fast and light. Combining advanced fabric technologies with our highest lofting down and slashing unnecessary grams with pioneering design.
The Mythic Range
900FP Goose Down | 10D Recycled Atmos™ Fabric | Weight Saving Baffle Construction
The Mythic range is all about slashing weight wherever possible. At home in high mountains, it’s ideal for venturing out long Alpine routes, multi-day climbs, treks, or bikepacking adventures.
The chevron style baffle design keeps the down in position, optimising core warmth and reducing the amount of fabric needed compared to traditional horizontal baffles. The outer is made from our own wind- and water-resistant, recycled Atmos™ fabric. The bag has a narrow mummy shape to minimise bulk, lightweight zips and pullers, and comes with a lightweight, waterproof, roll-top compression sack for protection from the elements and a small pack size while on the move.
The trapezoid boxwall baffle construction allows the down to fully loft, eliminates cold spots, and maximises warmth. It has an additional, adjustable baffle around the neck and an internal baffle along the length of the zip, both designed to stop the heat from escaping. Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, maintaining the down’s loft and warmth.
Atmos™ Recycled
Made using super-fine yarns in a tight construction, recycled Atmos™ is durable and packable. Windproof, fast-drying, and highly water-resistant, it protects against the weather on mountain adventures.
Main Fabric: 10D Recycled Atmos™ (27gsm) with Fluorocarbon-Free DWR
Fabric Lining: 10D Recycled Atmos™ (27gsm) with Fluorocarbon-Free DWR
The Mythic Ultra Range
900FP Goose Down | 10D Recycled Atmos™ Fabric | Weight Saving Baffle Construction | TILT Technology
For mountain marathon runners and committed alpinists who need to travel light, the Mythic Ultra is a game changer.
Built from lightweight recycled 10D Atmos™, it uses Thermo Ionic Lining Technology (TILT) to coat the fibres with titanium, helping reflect radiant heat back towards your body without compromising the fabric’s breathability. While that reduces the amount of down required for a given level of warmth, the angles of the bag’s trapezoidal boxwall construction also improve the evenness of down distribution, eliminating cold spots.
Filled in the UK with 900FP down, the Mythic Ultra provides one of the most efficient warmth-to-weight ratios available.
What is TILT Technology?
A radical, heat retaining tech that works like an emergency blanket reflecting heat back towards your body, while maintaining breathability and comfort. Boosting thermal efficiency, it keeps you warm when the temperature plummets.
Main Fabric: 10D Recycled Atmos™ (27gsm) with Fluorocarbon-Free DWR
Fabric Lining: 10D Recycled Atmos™ (28gsm) with Thermo Ionic Lining Technology (TILT).
Mythic Ultra 120 Modular
900FP Goose Down | 10D Recycled Atmos™ Fabric | Weight Saving Baffle Construction | TILT Technology | Underside Not Insulated
Designed as the perfect complement to the new Ultrasphere 4.5 sleep mat, yet versatile enough to be used with other inflatable mats, the award-winning Mythic Ultra 120 Modular cuts weight and bulk by only including insulation where it’s not already provided by your mat. The upper bag, and underside of the legs, is filled with ultra-high-lofting 900FP down and heat-reflective TILT, reducing radiant heat loss without a gram of unnecessary weight. Meanwhile, the lower bag hooks around the mat, which insulates you from the ground.
The result is an ultralight bag that, when combined with the Ultrasphere 4.5, forms a sleep system that weighs under 700g yet allows you to sleep comfortably down to 0°C. With a tiny pack size and uncompromised comfort, it’s the perfect sleeping bag for long-distance trekking, bikepacking, and multi-day mountain runs.
The lightweight stitch-through construction is low-bulk, with the down strategically positioned to optimise warmth. Secure the bag onto your sleep mat using the back harness, while the insulated side baffles marry up to the side of the mat to keep cold spots at bay. We’ve chosen a diagonal zip to allow easy entry and exit, as well as plenty of ventilation on warmer summer nights. Stash clothing in the hood sleeve to create an ultralight pillow, further streamlining your kit list.
The Mythic Ultra 120 Modular is hand-filled in the UK to ensure that its down has never been compressed before use, retaining its loft for your first epic adventure.
With the highest warmth-to-weight ratio in the Rab range, the Mythic sleeping bags are optimised for moving fast and light. Combining advanced fabric technologies with our highest lofting down and slashing unnecessary grams with pioneering design. The Mythic range is all about slashing weight wherever possible. At home in high mountains, it’s ideal for venturing out long Alpine routes, multi-day climbs, treks, or bikepacking adventures.