Sea to Summit Circuit Down Sleeping Bag -1C Regular

Sea to Summit Circuit Down Sleeping Bag

Sea to Summit

$449.99

Temperature Rating:

-1

Size:

Regular Long

Variant

1% for the Planet We'll donate $4.50 from this purchase to environmental charities.

Features

650+ Fillpower Ultra-Dry Duck Down — Packs down small into the included compression sack without sacrificing warmth.

Opens Fully Flat — Zip closed for cold nights or open wide for warm-weather airflow.

Wrap-Around Footbox Zip — Fully vent the footbox or fine-tune airflow for precise temperature regulation.

Hybrid Box-Baffle Construction — Prevents down migration and eliminates cold spots for consistent warmth throughout.

Brushed Interior Liner — Comfort-focused lining maximises freedom of movement without sacrificing insulation.

Shaped Collar & Draft Tubes — Down-filled draft tubes and a contoured collar seal in heat and block cold air.

20D Recycled Polyester Shell — Lightweight and breathable for moisture management, made from bluesign® approved recycled fabrics.

YKK Anti-Snag Zipper — Smooth, jam-free operation in any conditions.

ISO 23537 Certified — Independent certification confirms insulation performance at rated temperatures.

Internal Zippered Pocket — Keeps your phone or head torch secure and insulated through the night.

Specifications

Certification: Bluesign approved, ISO 13537-1, RCS - 1114661, RDS - 883003

Dimensions
-1C|30F R: 207 x 72.5cm
-1C|30F L: 222 x 77.5cm

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
-1C|30F R: 15.5 x 22.5 x 41cm
-1C|30F L: 15.5 x 22.5 x 41cm

Weight
-1C|30F R: 820g
-1C|30F L: 910g

Baffle design
-1C|30F R: Top is box-baffle, bottom is sew-through
-1C|30F L: Top is box-baffle, bottom is sew-through

Comfort temp rating (°C)
-1C|30F R: 2
-1C|30F L: 2

Compressed volume (L)
-1C|30F R: 5.4
-1C|30F L: 6

Extreme temp rating (°C)
-1C|30F R: -20
-1C|30F L: -20

Fill weight (g)
-1C|30F R: 411
-1C|30F L: 469

Insulation type: FP650GDD

Internal foot circumference (cm)
-1C|30F R: 102cm
-1C|30F L: 106cm

Internal hip circumference (cm)
-1C|30F R: 140cm
-1C|30F L: 150cm

Internal shoulder circumference (cm)
-1C|30F R: 145cm
-1C|30F L: 155cm

Lower temp rating (°C)
-1C|30F R: -1
-1C|30F L: -1

Recommended user height (cm)
R: 185cm
L: 198cm

Stuff/compression sack volume (L)
-1C|30F R: 13
-1C|30F L: 13

Zip coupling: No

Zipper configuration: Left handed full-length YKK#5 with zipper plow

Sea to Summit Circuit Down Sleeping Bag -1°C

Adapt to any adventure. The Circuit's semi-tapered-rectangular shape fits you and fits your travelling, camping and backpacking lifestyle. Its extra width allows you to sleep on your side, wrapped in 650+ fill power 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.

Quality 650+ fillpower Ultra-Dry Duck Down and lightweight fabrics allow the Circuit to pack down small into the supplied compression sack, while a comfort-oriented brushed liner maximises movement and maintains warmth all night.

The wrap-around zip opens the footbox fully for maximum venting and lets you fine-tune airflow, and a hybrid box-baffle construction prevents down migration for even warmth with no cold spots.

A YKK #5 coil zipper with an anti-snag plough ensures smooth, jam-free operation, while a shaped collar and continuous down-filled draft tubes minimise heat loss. An internal zippered pocket stores a phone or head torch securely. ISO 23537 certified for dependable insulation performance, and constructed from bluesign® APPROVED, 100% recycled fabrics.

Sea to Summit Circuit Down Sleeping Bag

$449.99