Rab Mythic 600 Sleeping Bag 900FP Goose Down, Four-Season Mummy Bag
$160.99 Original price was: $160.99.$110.99Current price is: $110.99.

Rab Mythic 600 Sleeping Bag is a four-season mummy sleeping bag with 600g of 900FP European goose down insulation. It has a listed total weight of 925g and an ISO EN comfort rating of -5°C (23°F). In addition, its recycled Atmos fabric uses a fluorocarbon-free DWR finish.
900FP Goose Down
The Mythic 600 contains 600g of 900-fill-power European goose down. Moreover, the down uses a Nikwax fluorocarbon-free hydrophobic treatment.
Four-Season Design
The supplied specifications identify the Mythic 600 as a four-season sleeping bag. Its mummy-shaped construction also helps reduce overall bulk.
ISO EN Temperature Ratings
The supplied ISO EN temperature ratings list a comfort rating of -5°C (23°F) and a limit rating of -12°C (10°F). In addition, the listed extreme rating is -32°C (-26°F).
These ratings represent standardized test values rather than guaranteed comfort temperatures for every user.
925g Total Weight
The sleeping bag has a listed total weight of 925g, or 32.6 oz. Meanwhile, the down insulation itself accounts for 600g, or 21.2 oz.
Chevron Baffle Construction
The sleeping bag uses a chevron-style baffle layout to manage the position of the down. Furthermore, trapezoidal box-wall construction with a differential cut provides space for the insulation to loft.
Adjustable Neck Baffle
An adjustable neck baffle forms part of the sleeping bag’s insulation design. In addition, an insulated baffle runs alongside the main zipper.
Recycled Atmos Fabric
The outer shell uses 10D recycled Atmos fabric with a listed weight of 27gsm. The lining also uses 10D recycled Atmos material. Moreover, both are specified with a fluorocarbon-free DWR finish.
YKK 3/4-Length Zipper
A YKK 3/4-length main zipper provides access to the sleeping bag. Furthermore, an internal anti-snag zip guard is included in the construction.
Internal Storage Pocket
A YKK zippered internal stash pocket provides space for compatible small personal items.
Angled Foot Box
The Mythic 600 uses an angled foot-box design. This forms part of the bag’s narrow mummy-shaped construction.
Compression Sack Included
A lightweight waterproof roll-top compression sack is included with the sleeping bag. Therefore, the bag can be compressed for compatible packing and transport.
Key Specifications
• Brand: Rab
• Model: Mythic 600
• Product type: Down sleeping bag
• Season rating: Four-season, as supplied
• Shape: Mummy
• Total weight: 925g / 32.6 oz.
• Insulation: European goose down
• Fill power: 900FP
• Down fill weight: 600g / 21.2 oz.
• Down treatment: Nikwax fluorocarbon-free hydrophobic finish
• Comfort rating: -5°C / 23°F
• Limit rating: -12°C / 10°F
• Extreme rating: -32°C / -26°F
• Rab sleep limit: -12°C / 10°F
• Main fabric: 10D recycled Atmos, 27gsm
• Lining: 10D recycled Atmos, 27gsm
• Finish: Fluorocarbon-free DWR
• Main zipper: YKK 3/4 length
• Internal pocket: YKK zippered stash pocket
• Packed size: 40 x 26 cm / 15.7 x 10.2 in.
• Compression sack: Included
• Product code: QSI-46
1. Order Processing Time
Orders are prepared and processed before being handed over for delivery.
- Processing Time: 1–2 business days (Monday to Friday)
- Order Cutoff Time: 5:00 PM (PT)
- Orders placed after the cutoff time, on weekends, or on public holidays will begin processing on the next business day.
2. Shipping Time
After your order has been processed and dispatched:
- Estimated Transit Time: 4–6 business days (Monday to Friday)
- Estimated Total Delivery Time: 5–8 business days, including processing
- Shipping Cost: Free
Delivery times are estimates and may occasionally be affected by carrier delays, weather conditions, holidays, or other circumstances outside our reasonable control.
3. Order Tracking
Tracking information is provided for shipped orders. Once your order has been dispatched, you will receive tracking details that can be used to monitor the delivery status of your package.
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