Sea to Summit Circuit Down Sleeping Bag −9°C
6 or 12 months Interest Free with Gem Visa*
$250 minimum purchase. Minimum monthly payments required. Lending criteria, T&Cs & fees apply.
Terms & fees
Includes a $55 establishment fee and $65 annual fee ($32.50 half-yearly). Standard interest rate (currently 29.49% p.a.) applies after the Interest Free term ends. *Paying only the minimum monthly repayment of 3% of the outstanding monthly balance or $20 (whichever is more) may not be sufficient to repay the purchase amount(s) during the Interest Free term. Further information on rates and fees is available at gemfinance.co.nz. Credit provided by Latitude Financial Services Limited.
For colder nights when extra down insulation is worth the larger packed size. The Circuit combines a roomy semi-tapered rectangular shape with 650+ fill power Ultra-Dry duck down. Open the wraparound zip to vent your feet or lay the bag flat as a quilt.
Three reasons to choose Circuit
- Space to sleep on your side: a roomy shape and soft brushed lining.
- Warmth without unnecessary bulk: 650+ fill power RDS-certified Ultra-Dry duck down.
- Vent or open flat: the wraparound zip opens the footbox and converts the bag to a quilt.
Choose your size
| Specification | Regular | Long |
|---|---|---|
| Recommended sleeper height | Up to 185 cm | Up to 198 cm |
| Bag weight | 1160 g | 1290 g |
| Packed weight | 1330 g | 1450 g |
| Down fill weight | 715 g | 814 g |
| Compressed volume | 9.7 L | 10.8 L |
| Bag length × width | 207 × 72.5 cm | 222 × 77.5 cm |
| Packed dimensions | 46 × 27.5 × 18 cm | 46 × 27.5 × 18 cm |
Choose by recommended sleeper height. Bag length is the overall length. Manufacturer weights and packed measurements are average figures.
Choose your warmth
ISO comfort: −5°C. ISO lower limit: −9°C. The model name uses the lower limit. Start with comfort if you sleep cold, and allow a margin for the forecast, your mat and clothing.
| Circuit model | Comfort / limit | Regular weight / volume |
|---|---|---|
| −1°C | +2°C / −1°C | 820 g / 5.4 L |
| −9°C (this model) | −5°C / −9°C | 1160 g / 9.7 L |
Construction and features
- 650+ fill power duck down with RDS certification and a non-PFAS Ultra-Dry treatment.
- 20D recycled polyester shell and lining, with a soft brushed inner feel.
- Hybrid box baffles help hold the down in place.
- Left-hand full-length YKK #5 wraparound zip with an anti-snag plough.
- Shaped collar and down-filled draft tubes help reduce heat loss.
- Internal zipped pocket for small essentials.
- Dark Blue colour.
What’s included
- Sea to Summit Circuit Down Sleeping Bag −9°C
- Compression sack
- Storage cell
Frequently asked questions
Does −9°C mean I will be comfortable at that temperature?
The model name uses the ISO lower limit: −9°C. Its ISO comfort rating is −5°C. Start with comfort if you sleep cold, and allow a margin for the nights you expect. Ratings are laboratory comparisons, not a guarantee for every sleeper. An insulated mat, shelter and clothing also affect warmth.
Should I choose Regular or Long?
Regular is recommended for sleepers up to 185 cm. Long is recommended up to 198 cm and is also 5 cm wider. These are recommended sleeper heights; the 207 cm and 222 cm figures are the overall bag lengths. Choose a fit that leaves room at your feet without pressing the insulation flat.
How is the −9°C different from the −1°C?
Both have the same roomy shape, 650+ fill power down and wraparound zip. The −1°C has a +2°C comfort rating and weighs 820 g in Regular. The −9°C has a −5°C comfort rating and weighs 1160 g in Regular. Choose −9°C for the colder comfort rating, allowing for its greater weight and packed volume.
Can it open flat or zip to another sleeping bag?
It opens fully flat as a quilt. You can also open the footbox while keeping the upper section zipped. Circuit bags cannot zip together or couple with other Sea to Summit bags; this model has a left-hand wraparound zip.
Is it waterproof?
No. Ultra-Dry Down and the water-repellent shell help manage moisture, but the bag is not waterproof. Keep it protected from rain and water in your pack and use suitable shelter.
Is there a women’s version?
Circuit is a unisex range. Use the comfort rating as your starting point if you sleep cold: −5°C for this model. Choose Regular or Long by your height and the room you need.
What is included, and how should I store it?
The sleeping bag includes a compression sack for transport and a storage cell for keeping it loose between trips. Air it after use, let it dry completely and store it uncompressed. Follow Sea to Summit’s care instructions for cleaning.
