Source-linked specifications for the Therm-a-Rest Boost 650 20F/-6C — Long. This is a detailed sleeping bags record, checked on 2026-10-30; price and live stock are not verified.
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-TAR-BOOST] |
| ISO comfort temperature | 32°F [BQ-TAR-BOOST] |
| ISO lower-limit temperature | 20°F [BQ-TAR-BOOST] |
| Temperature test standard | EN (edition unspecified) [BQ-TAR-BOOST] |
| Fill | hydrophobic RDS duck down [BQ-TAR-BOOST] |
| Fill power | 650 [BQ-TAR-BOOST] |
| Fill weight | 25.9 oz [BQ-TAR-BOOST] |
| Maximum listed user height | 78 in [BQ-TAR-BOOST] |
| Shoulder girth | 65 in [BQ-TAR-BOOST] |
| Zipper side | left [BQ-TAR-BOOST] |
| Length | 85 in [BQ-TAR-BOOST] |
| Weight | 3.08 lb [BQ-TAR-BOOST] |
| Packed length | 13 in [BQ-TAR-BOOST] |
| Packed diameter | 7.5 in [BQ-TAR-BOOST] |
| Extreme f | -9°F [BQ-TAR-BOOST] |
| Hip girth in | 61 in [BQ-TAR-BOOST] |
| Foot girth in | 61 in [BQ-TAR-BOOST] |
| Shell fabric | 20D recycled nylon ripstop [BQ-TAR-BOOST] |
| Lining fabric | 20D recycled nylon ripstop [BQ-TAR-BOOST] |
| Water repellent treatment | PFAS-free hydrophobic down [BQ-TAR-BOOST] |
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.
Sizes and alternatives
Compare a size against its own record. Shared family names do not prove identical weight or dimensions.
Other models to inspect
Verification limits
Evidence basis: manufacturer_declared. US market: unverified. Listing status: listed. These labels do not establish current stock.
Unverified fields: See blank fields in the source data.
- Regional source is EU; source unit pairs contain some rounding differences.
Where these facts came from
- Boost 650 20F/-6C Sleeping Bag — Therm-a-Rest, accessed 2026-10-30 [BQ-TAR-BOOST]
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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