Source-linked specifications for the REI Co-op Radiant 20 — Medium. 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 25°F (-3.9°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
Medium 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-REI-RADIANT] |
| ISO comfort temperature | 25°F [BQ-REI-RADIANT] |
| ISO lower-limit temperature | 13°F [BQ-REI-RADIANT] |
| Temperature test standard | ISO (edition unspecified) [BQ-REI-RADIANT] |
| Fill | down with synthetic draft collar/tube/footbox panel [BQ-REI-RADIANT] |
| Fill power | 600 [BQ-REI-RADIANT] |
| Maximum listed user height | 71 in [BQ-REI-RADIANT] |
| Shape | mummy [BQ-REI-RADIANT] |
| Zipper side | left [BQ-REI-RADIANT] |
| Weight | 43 oz [BQ-REI-RADIANT] |
| Manufacturer rated temperature f | 19°F [BQ-REI-RADIANT] |
| Fill weight oz | 25.4 oz [BQ-REI-RADIANT] |
| Packed volume l | 6.7 L [BQ-REI-RADIANT] |
| Shell fabric | recycled polyester [BQ-REI-RADIANT] |
| Lining fabric | recycled polyester [BQ-REI-RADIANT] |
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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Verification limits
Evidence basis: manufacturer_declared. US market: confirmed. Listing status: listed. These labels do not establish current stock.
Unverified fields: See blank fields in the source data.
- Product model name is Radiant 20; the technical specification reports a 19F overall rating. Both fields retained.
Where these facts came from
- Radiant 20 Sleeping Bag — REI Co-op, accessed 2026-10-30 [BQ-REI-RADIANT]
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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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