Sea to Summit Circuit Down Sleeping Bag

Not available at this time or sold in-store only. $449.99

Adapt to any adventure. The Circuit’s semi-tapered-rectangular shape fits you and fits your travelling, camping and hiking lifestyle. Its extra width allows you to sleep on your side, wrapped in 650+fillpower down and soft-touch fabrics. As the weather warms, the wraparound zipper lets you ventilate the bag from top to bottom, and even open it as a fully flat quilt. Sea to Summit design and quality, non-PFAS recycled materials and ISO-tested performance make this light, packable bag the perfect travel companion.

FEATURES

Comfort in all conditions - Opens flat for airflow on warm nights or zips closed to lock in warmth when temperatures drop
Efficient packability - Quality 650+ fillpower Ultra‑Dry Duck Down and lightweight fabrics allow the Circuit to pack down small into the supplied compression sack
Room to move - Comfort-oriented, brushed liner maximise movement and maintain warmth all night
Precise ventilation - Wrap‑around zip lets you fully open the footbox for maximum venting and fine-tune airflow to regulate temperature
Lightweight breathability - Featherlight 20D polyester balances airflow for moisture management with proven durability for long-term use
Consistent insulation - Hybrid box‑baffle construction prevents down migration, eliminating cold spots for even warmth
Easy zipping - YKK #5 coil zipper with anti‑snag plough ensures smooth, jam‑free operation in all conditions for hassle‑free use
Draft protection - Shaped collar and continuous down-filled draft tubes minimise heat loss and maximise retained warmth
Verified warmth - ISO 23537 certification confirms dependable insulation performance for rated temperatures
Internal pocket - Zippered pocket stores essentials like your phone or head torch securely while keeping them insulated from the cold
Lower impact materials - Constructed from bluesign APPROVED, 100% recycled fabrics are designed to go the distance

TECH SPECS

Certification

bluesign APPROVED, ISO 13537-1, RCS - 1114661, RDS - 883003

Dimensions

Material

Shell: 100% Recycled Polyester; Lining: 100% Recycled Polyester; Insulation: FP650 Grey Duck Down 80/20 DWR RDS; Compression Sack: 100% Recycled Nylon; Storage Cell: 100% Recycled Nylon

Packed dimensions

Weight

Baffle design

Comfort temp rating (°C)

-1C|30F S: 2
-1C|30F R: 2
-1C|30F L: 2
-9C|15F S: -5
-9C|15F R: -5
-9C|15F L: -5

Compressed volume (L)

-1C|30F S: 5.1
-1C|30F R: 5.4
-1C|30F RW: 5.9
-1C|30F L: 6
-9C|15F S: 9
-9C|15F R: 9.7
-9C|15F RW: 10.5
-9C|15F L: 10.8

Extreme temp rating (°C)

-1C|30F S: -20
-1C|30F R: -20
-1C|30F L: -20
-9C|15F S: -32
-9C|15F R: -32
-9C|15F L: -32

Fill weight (g)

-1C|30F S: 384
-1C|30F R: 411
-1C|30F RW: 460
-1C|30F L: 469
-9C|15F S: 664
-9C|15F R: 715
-9C|15F RW: 798
-9C|15F L: 814

Insulation type

FP650GDD

Internal foot circumference (cm)

Internal hip circumference (cm)

Internal shoulder circumference (cm)

Lower temp rating (°C)

-1C|30F S: -1
-1C|30F R: -1
-1C|30F L: -1
-9C|15F S: -9
-9C|15F R: -9
-9C|15F L: -9

Recommended user height (cm)

S: 170cm
R: 185cm
RW: 185cm
L: 198cm

Stuff/compression sack volume (L)

-1C|30F S: 13
-1C|30F R: 13
-1C|30F RW: 13
-1C|30F L: 13
-9C|15F S: 20
-9C|15F R: 20
-9C|15F RW: 20
-9C|15F L: 20

Zip coupling

Zipper configuration

Left Handed Full-Length YKK#5 with Zipper Plow

Collections: Hiking, Kokoda Track, NZ TAS Treks, Outdoor Education Sleeping Bags, Sleeping, Sleeping Bags