RAB Mythic Ultra 120 Modular Down Sleeping Bag

RAB Mythic Ultra 120 Modular Down Sleeping Bag

The ab Mythic Ultra 120 Modular is an ultralight down sleeping bag designed for minimalist adventures such as mountain running, bikepacking and fast hikes. Weighing only around 330 grams and with an innovative construction that focuses on reducing unnecessary insulation, it offers an impressive warmth-to-weight performance.

Comfort temperature

Because the Mythic Ultra 120 Modular has a unique design with an uninsulated back intended for use with an insulated sleeping pad, it does not undergo standardized EN 13537/ISO 23537 tests for temperature classification. However, Rab specifies a sleep limit of 0°C when used with a sleeping pad with an R-value of 4 or higher.

This means that the sleeping bag is suitable for use in temperatures around the freezing point, provided it is combined with a high-quality insulating sleeping pad. For optimal comfort, it is recommended to use the sleeping bag in temperatures above +5°C, especially if you are cold or do not have a sufficiently insulating mattress.

Summary of the sleeping bag

• Weight: about 330 g

• Insulation: 900FP European goose down with Nikwax fluorocarbon-free hydrophobic treatment (120g)

• Material: 10D recycled Atmos™ with TILT (Thermo Ionic Lining Technology)

• Recommended use temperature: above +5°C for comfort, with a sleep limit of 0°C when used with R4 sleeping pad

• Pack size: 32 x 16 cm

The Mythic Ultra 120 Modular is an excellent choice for the weight-conscious outdoor enthusiast looking for a lightweight and compact sleeping bag for warmer conditions. For colder temperatures or winter use, a sleeping bag with higher insulation capacity is recommended.

The award-winning Mythic Ultra 120 Modular keeps weight and bulk down by only including insulation where it is not already provided by your sleeping pad. The top and underside of the legs are filled with ultra-high loft 900FP down and heat-reflective TILT, reducing stray heat loss without an ounce of unnecessary weight. Meanwhile, the lower section wraps around the sleeping pad insulating you from the ground. With a small pack size and uncompromising comfort, it's the perfect sleeping bag for long hikes, bikepacking and multi-day trail running. The down is strategically placed to optimize warmth. Attach the sleeping bag to your sleeping pad using the rear harness, while the insulated side baffles join the side of the sleeping bag to keep out drafts.

We've chosen a diagonal zipper to allow for easy entry and exit, as well as plenty of ventilation on warmer summer nights. Store clothes in the hood to create an ultralight cushion, further streamlining your packing. The Mythic Ultra 120 Modular is hand-filled in the UK to ensure its down has never been compressed before use, retaining its loft for your first epic adventure. Due to its construction
this bag does not meet the criteria for an EN test. Our sleep limits are based on our years of experience, supplemental testing and feedback from athletes and test teams.