Source-linked specifications for the Western Mountaineering MegaLite — 66 in manufacturer size. 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
66 in manufacturer size 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.
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: max_user_height_in, temperature_standard
- Manufacturer size label is retained separately from actual bag length and confirmed maximum user height.
- WM rating and comfort/limit/extreme comparison values have different meanings.
- Imperial manufacturer table retained; metric equivalents on product pages may be rounded differently.
Where these facts came from
- Sleeping Bag Specifications Chart — Western Mountaineering, accessed 2026-10-30 [BQ-WM-CHART]
- MegaLite — Western Mountaineering, accessed 2026-10-30 [BQ-WM-MEGALITE]
- Sleeping Bag Temperature Ratings Explained — Western Mountaineering, accessed 2026-10-30 [BQ-WM-TEMP]
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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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