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RAB Mythic 400


RAB Mythic 400
RAB Mythic 400
RAB Mythic 400
RAB Mythic 400
RAB Mythic 400
RAB Mythic 400
RAB Mythic 400

Campaign price
503,20 + delivery costs
Offer ends in
Normal price 629,00 €
Incl. VAT 24 %


RAB Mythic 400 Cloud

Regular (<185cm)

Other feature
Left Zipper

Colour: Cloud
Size: Regular (<185cm)
Other feature: Left Zipper

Store (Helsinki)on-shelf1 pc immediately
Store (Helsinki)in stockover 5 pcs immediately
Available in the webstoreover 5 pcs immediately


Detailed availability

Location Store (Helsinki): Trekking, 9, warehouse

Overall rating ()

Product description
Comfort: -1°C (30°F)
Limit: -6°C (21°F)
Extreme: -24°C (-11°F)

Ultra-lightweight with a highly tapered cut, the Mythic 400 is designed for alpine style missions where weight and pack size are crucial to success. Filled with 900FP goose down and covered with a lightweight Atmos™ ripstop fabric, it's a high-performance bag for those meticulously counting grams.

The Mythic range is all about slashing weight wherever possible. The Mythic 400 is an extremely lightweight, three season bag. At home in high mountains, it’s ideal for venturing out long Alpine routes, multi-day climbs, treks or bike packing adventures.

Weighing in at just 660g, it contains 400g of 900FP, goose down. 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, Atmos™ fabric. At just 7D with a built-in ripstop, it’s both ultra-light and super tough. It 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 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.
  • 900FP R.D.S Certified European Goose Down with Nikwax fluorocarbon-free Hydrophobic Finish
  • Weight saving chevron baffle design, reduces down migration and optimises core warmth.
  • Trapezoidal boxwall construction with differential cut, to maximise loft and warmth
  • Close fitting adjustable neck baffle design for decreased heat loss
  • YKK 3/4 length main zip with synthetic filled baffle to trap warmth
  • YKK zipped internal stash pocket
  • Angled foot box for relaxed sleeping posture
  • Anti snag internal zip guard
  • Hand-filled in Derbyshire UK
  • Zipped cotton sack with water-resistant base for home storage
  • Lightweight waterproof roll-top compression sack included
  • 100% polyamide
  • Tapered Mummy Shape
Weight: 660g/23.3oz
Internal Shoulder Circumference: 160cm / 63 inch
Packed size: (Reg) 35x23cm/13.8x9.1 inch

Material: 7D Atmos™ nylon ripstop (23gsm) \ DWR
Lining: 7D Atmos™ nylon ripstop (23gsm) \ DWR
900FP R.D.S Certified European Goose Down with Nikwax fluorocarbon-free Hydrophobic Finish

RAB size guide

The approximate size of the packed product or the sales package is 600 x 400 x 100 mm.

-1 °C

-24 °C


-6 °C

0,66 kg
(with sales package 0,8 kg)

Country of origin
United Kingdom

Igor S. verified buyer, 5.6.2024
Overall rating
Translated by GoogleShow original
Excellent sleeping bag, very pleasant to the touch. I already have Mythic 600, which is much larger. This sleeping bag is much more compact.
Esther H. verified buyer, 12.10.2022
Overall rating
Translated by GoogleShow original
I haven't tried it yet, but it looks great.
Anonymous verified buyer, 14.9.2022
Overall rating
Translated by GoogleShow original
An absolutely great bag that is light and takes up an incredibly small space: especially if you pack it in a proper compression bag, which is not included (the bag comes with a large storage bag and a waterproof dry sack, which can also be made small). If you're looking for bad sides, the zippered pocket is a bit uncomfortable on the chin/neck, so it's not comfortable to store your phone in it.
Anonymous verified buyer, 16.7.2022
Overall rating
Translated by GoogleShow original
The zipper broke on the first use. Going to the importer soon. Let's see if it can be fixed and how it works.
Tuukka V. verified buyer, 15.2.2022
Overall rating
Translated by GoogleShow original
So good not to be said, it was worth paying for this quality. Just the number one bag for three seasons especially for bikepacking chores where space is on the card
Brian N. verified buyer, 6.10.2021
Overall rating
This Rab Mythic 400 is a really good sleeping bag. It kept me really warm in the middle of the Glens of Scotland. I couldn’t believe how light and warm the Mythic 400 could be, it can be packed away small in its small dry bag. There is one thing Rab could do really well in the small dry bag it comes with, this would be a small valve to release the excess air out of the small dry bag which would be a great device to have.
Anonymous verified buyer, 8.4.2021
Overall rating
Superb weight/warmth ratio sleepingbag in my opinion. Looked for a bag that can be used at higher altitudes and also in spring/autumn and that is easy to carry on multiday hikes with full gear. Found all of that with this bag. Very pleasant liner fabric, shorter zipper hardly noticable and this far comfortably warm (although I’ve used an extra liner with below zero temperature). Looking forward to be allowed to use it outside of our country, in the mountains again! Btw, the bag was delivered perfectly by Varuste (not stuffed but packed loosly instead!)
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Mythic Down Sleeping Bag Collection | Rab Lab


Care instructions for down

Down is an overpowering natural material. In order for your down product to serve you as long as possible, it must also be treated with the same sensitivity and warmth as it takes care of you even in the harshest conditions. Storage: Down must be allowed to breathe pr...

How to choose a sleeping bag

Sleeping bag is, along with a proper sleeping pad, one of the most important factors in a successful trip. When you rest well at night, you will have energy for adventures on the next day. The factors which affect the choice of the sleeping bag are basically the use temperatur...