Sea to Summit official product photography (Sea to Summit Circuit Down Sleeping Bag)
Sea to Summit
Wide down bag that opens flat. The 30 F Regular lists 28.9 oz and prices from $259.
Sea to Summit lists 650+ fill duck down and a full-length zipper that opens the bag flat.
$259 to $339.95 Price checked Oct 13, 2026
seatosummit.com listed Circuit Down prices from $259 to $339.95 when checked. Source: Sea to Summit Circuit Down Sleeping Bag. Checked Oct 13, 2026. Confirm the price before you buy.
Sleep systems
The Circuit is a wider down bag for camping and travel. Sea to Summit fills it with 650+ fill power grey duck down and a wraparound zipper that opens the bag flat.
The 30 F Regular lists 820 g / 28.9 oz and an ISO lower rating of 30 F / -1 C. Prices run from $259 to $339.95.
Shortlist reason: Sea to Summit lists 650+ fill duck down and a full-length zipper that opens the bag flat.
| 30 F Regular weight | 820 g / 28.9 oz seatosummit.com |
|---|---|
| 30 F ISO lower | 30 F / -1 C seatosummit.com |
| Fill | 650+ fill power grey duck down, RDS seatosummit.com |
| Shell and lining | 100% recycled polyester seatosummit.com |
Feathered Friends
Feathered Friends lists 20 F, 30 F, and 40 F options with 950+ goose down.
$499 to $579 Price checked Oct 13, 2026
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Feathered Friends
Feathered Friends rates the Ibis Light at 0 F and lists 900+ goose down.
$859 to $889 Price checked Oct 13, 2026
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Feathered Friends
Feathered Friends lists a two-person bag with a Dyneema floor and 950+ goose down.
$1029 to $1059 Price checked Oct 13, 2026
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