Source-linked specifications for the Rab Mythic 20 — Long. This is a detailed sleeping bags record, checked on 2026-10-30; price and live stock are not verified.
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What the specs mean
The product name or temperature label is not automatically an ISO comfort rating. The recorded comfort figure is 32°F (0.0°C); verify the exact size and test method before planning a cold night. Fit also depends on usable internal length, shoulder room and your sleeping position. Pad insulation and weather matter as much as the bag.
Read the exact variant
Long is the recorded option. Other sizes or revisions may have different dimensions, weight, or test labels.
Reported specifications
Unit conversions are calculated from the source value. Open the source tag for the originally published number.
| Specification | Manufacturer or retailer value |
|---|---|
| Product temperature label | 20°F [BQ-RAB-MYTHIC20] |
| ISO comfort temperature | 32°F [BQ-RAB-MYTHIC20] |
| ISO lower-limit temperature | 21°F [BQ-RAB-MYTHIC20] |
| Temperature test standard | ISO 23537-1:2022 [BQ-RAB-MYTHIC20] |
| Fill | European goose down [BQ-RAB-MYTHIC20] |
| Fill power | 900 [BQ-RAB-MYTHIC20] |
| Shape | tapered mummy [BQ-RAB-MYTHIC20] |
| Extreme f | -11°F [BQ-RAB-MYTHIC20] |
| Length cm | 90.6 in [BQ-RAB-MYTHIC20] |
| Max user height cm | 78.7 in [BQ-RAB-MYTHIC20] |
| Shoulder girth cm | 63.8 in [BQ-RAB-MYTHIC20] |
| Hip girth cm | 53.5 in [BQ-RAB-MYTHIC20] |
| Foot girth cm | 40.9 in [BQ-RAB-MYTHIC20] |
| Shell fabric | 10D Pertex Quantum ripstop [BQ-RAB-MYTHIC20] |
| Lining fabric | 10D recycled Atmos with heat-reflective TILT [BQ-RAB-MYTHIC20] |
| Water repellent treatment | fluorocarbon-free DWR / Grangers hydrophobic down [BQ-RAB-MYTHIC20] |
| Zipper length fraction | 0.5 [BQ-RAB-MYTHIC20] |
A blank or unverified value means the dataset cannot support a number; it does not mean zero. Each source tag opens the record used for that field.
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Compare a size against its own record. Shared family names do not prove identical weight or dimensions.
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Verification limits
Evidence basis: manufacturer_declared. US market: confirmed. Listing status: listed. These labels do not establish current stock.
Unverified fields: fill_weight_g, packed_diameter_cm, packed_length_cm, weight_g
- Manufacturer generic weight/fill/packed size accepted for Regular only; longer variant must not inherit these values.
Where these facts came from
- Mythic Down Sleeping Bag 20F — Rab, accessed 2026-10-30 [BQ-RAB-MYTHIC20]
We link to a seller or manufacturer for verification and do not handle purchases, delivery, or returns. Check current terms and the exact SKU with that seller.
Questions to ask before buying
Is the listed price current?
No price or live stock data is included. Use the official product link for the current listing.
Does a nominal capacity or temperature label guarantee fit or warmth?
No. Compare exact dimensions and tested values where available, then allow for real-world conditions.
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