Lightweight

Packable

ISPO Award Winner (2023)

Mythic Ultra 120 Modular Down Sleeping Bag (32°F)

$465.00

Size and shape guide

Shape: Tapered Mummy

Size guide

Shape guide

Dimensions

Imperial (in)

Metric (cm)

Measurements	Regular
Sleeping bag length	84.6 in
Max user height	72.8 in
Internal shoulder girth	63.0 in
Internal hip girth	52.8 in
Internal foot girth	40.2 in
Pack size	12.6 in x 6.3 in

Measurements	Regular
Sleeping bag length	215cm
Max user height	185cm
Internal shoulder girth	160cm
Internal hip girth	134cm
Internal foot girth	102cm
Pack size	32cm x 16cm

Tapered Mummy

The narrowest of our bags, it eliminates ‘dead space’ making it as thermally efficient as possible. This cut generally means that the bag rolls with you while you sleep. Although compromising on space, this shape will maximise performance and keep pack size and weight to a minimum.

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Info
Delivery and returns Delivery
Rab Promise

Slash weight from your kit list with this award-winning ultralight modular bag, designedfor thru-hiking, bikepacking, and mountain running.

Activities

Fast & light adventures
Mountaineering
Trekking

Key benefits

Very low pack size
Very light

Awards

ISPO Award Winner (2023)

Shipping

Rab ships throughout the United States via USPS and FedEx Ground daily from our US warehouse in Colorado and will take between 2 and 5 days depending on your location. Orders over $50 qualify for free shipping, otherwise, a flat rate of $6.00 will be charged per order under $50.

For more information, please visit our delivery page.

Returns

If you are unhappy with your purchase, please return it to us within 45 days of receipt. The item(s) must be in resalable condition with tags attached. We are currently unable to exchange items and will refund products returned to us under the policy below.

For more information, please visit our returns page.

This unique guarantee promises to support you before, during and after your adventure, combining gear advice, aftercare services, and our Rab Warranty, to help you get more out of your gear.

For more information, please visit our Rab Promise page.

Features

Weight330g/11.6oz
Insulation900FP European Goose Down with Nikwax Fluorocarbon-Free Hydrophobic Finish (120g/4.2oz)
Main fabric10D Recycled Atmos™ (27gsm) with Fluorocarbon-Free DWR
Fabric lining10D Recycled Atmos™ (28gsm) with Thermo Ionic Lining Technology (TILT)
Rab sleep limit32°F / 0°C with air mats rating R4 or above
Packed size12.6in x 6.3in (32cm x 16cm)
Product codeQSI-40

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.

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.

Due to its construction, this bag does not meet the criteria for an EN test. Our sleep limits are based on our many years of experience, supplementary testing, and athlete and test team feedback. Head over to Rab Lab to find out more about the Rab Sleep Limit.

TILT and 900FP down on upper bag and lower legs achieves high warmth to weight ratio
Integrated mat sleeve secures uninsulated area of the bag to air mat
Rab sleep limit of 0°C (32°F) achieved with air mats rating R4 or above
diagonal zip entry with YKK® 2-way zip allows easy entry and exit, and versatile venting
Pillow sleeve designed for folded clothing for use as a ultralight pillow
Down-filled anti-snag zip baffle
Lightweight roll-top compression sack included
Filled in Derbyshire UK
Optimally filled, lightweight stitch-through construction

Material Facts

Mythic Ultra 120 Modular Down Sleeping Bag (32°F)

	Recycled	PFAS PFAS This column shows where fluorocarbons (PFAS) may still be present in our products. No PFAS means we’ve phased out all intentionally added PFAS from the corresponding component and are compliant with current EU and US legislation.
Total content Total content The total percentage of an item's weight that is recycled.	57%	No
Fabric Fabric Some of our products use multiple fabrics, especially waterproof items. This figure shows the total percentage of an item's fabrics which are recycled, calculated by weight.	98%	No
Outer	100%	No
Liner	96%	No
Liner Yarns	0%	No
Liner Coatings	0%	No
Hydrophobic down	0%	No
Zips Zips This figure includes zipper tape, teeth, sliders, and pullers, showing their total recycled content by weight.	29%	No
Trims Trims This section shows the recycled content by weight for all components added to our products that are not captured in the other categories. For example, cord locks, pocket linings, buttons, cords, size labels, and eyelets.	2%	No
Renewable energy
Product manufacturing	64%
Manufactured in United Kingdom
*Calculations based upon the weight of a regular length sleeping bag.
QSI-40 Version 03/2024

Material Facts is the way forward.

We’re helping you to make informed choices by giving you the raw data. Clear. Concise. Honest.

Learn More

Tech and features.

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 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.

Features

Weight330g/11.6oz
Insulation900FP European Goose Down with Nikwax Fluorocarbon-Free Hydrophobic Finish (120g/4.2oz)
Main fabric10D Recycled Atmos™ (27gsm) with Fluorocarbon-Free DWR
Fabric lining10D Recycled Atmos™ (28gsm) with Thermo Ionic Lining Technology (TILT)
Rab sleep limit32°F / 0°C with air mats rating R4 or above
Packed size12.6in x 6.3in (32cm x 16cm)
Product codeQSI-40

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 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.

TILT and 900FP down on upper bag and lower legs achieves high warmth to weight ratio
Integrated mat sleeve secures uninsulated area of the bag to air mat
Rab sleep limit of 0°C (32°F) achieved with air mats rating R4 or above
diagonal zip entry with YKK® 2-way zip allows easy entry and exit, and versatile venting
Pillow sleeve designed for folded clothing for use as a ultralight pillow
Down-filled anti-snag zip baffle
Lightweight roll-top compression sack included
Filled in Derbyshire UK
Optimally filled, lightweight stitch-through construction