Source-linked specifications for the Big Agnes Sidewinder 20 — Small. 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 30°F (-1.1°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
Small 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-BA-SIDEWINDER] |
| ISO comfort temperature | 30°F [BQ-BA-HTML-SIDEWINDER-20] |
| ISO lower-limit temperature | 19°F [BQ-BA-HTML-SIDEWINDER-20] |
| Temperature test standard | ISO (edition unspecified) [BQ-BA-HTML-SIDEWINDER-20] |
| Fill | DownTek down with body-mapped FireLine Eco recycled synthetic [BQ-BA-SIDEWINDER] |
| Fill power | 650 [BQ-BA-SIDEWINDER] |
| Maximum listed user height | 66 in [BQ-BA-HTML-SIDEWINDER-20] |
| Shape | mummy for side sleepers [BQ-BA-SIDEWINDER] |
| Shoulder girth | 58 in [BQ-BA-HTML-SIDEWINDER-20] |
| Zipper side | ambidextrous [BQ-BA-SIDEWINDER] |
| Weight | 2.25 lb [BQ-BA-HTML-SIDEWINDER-20] |
| Shell fabric | recycled polyester ripstop [BQ-BA-SIDEWINDER] |
| Lining fabric | recycled polyester taffeta [BQ-BA-SIDEWINDER] |
| Water repellent treatment | finish without intentionally added PFAS [BQ-BA-SIDEWINDER] |
| Pillow retention | Pillow Barn [BQ-BA-SIDEWINDER] |
| Hip girth in | 52 in [BQ-BA-HTML-SIDEWINDER-20] |
| Foot girth in | 33 in [BQ-BA-HTML-SIDEWINDER-20] |
| Compressed dimensions in | 9.5, 8.0 [BQ-BA-HTML-SIDEWINDER-20] |
| Stuff sack dimensions in | 8.0, 17.5 [BQ-BA-HTML-SIDEWINDER-20] |
| Stuff sack volume l | 14 L [BQ-BA-HTML-SIDEWINDER-20] |
| Down fill weight g | 13.8 oz [BQ-BA-HTML-SIDEWINDER-20] |
| Synthetic fill weight g | 6.0 oz [BQ-BA-HTML-SIDEWINDER-20] |
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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Search for Big Agnes Sidewinder 20 and check the exact size, revision and seller details before ordering.
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Compare a size against its own record. Shared family names do not prove identical weight or dimensions.
No other verified size is in this local dataset.
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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.
- Exact variant weight, fit/girths and packing rows were subsequently verified from the official public HTML JavaScript specification array on2026-10-30. Stuff-sack geometry and compressed geometry are separate fields.
- Manufacturer SI mass values are preserved as published; rounded Imperial pairs remain in raw_specs.
Where these facts came from
- Sidewinder 20 official numerical specification table — Big Agnes, accessed 2026-10-30 [BQ-BA-HTML-SIDEWINDER-20]
- Sidewinder 20 — Big Agnes, accessed 2026-10-30 [BQ-BA-SIDEWINDER]
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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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