SEA TO SUMMIT Circuit Down Sleeping Bag -1C|30F Long

The Sea to Summit Circuit sleeping bag is designed for travellers, backpackers and camping enthusiasts looking for a versatile companion for a wide range of conditions. Its semi-tapered rectangular shape offers plenty of room for comfortable side sleeping while still staying compact for easy carrying.

With ISO 23537 certification and recycled materials approved to the bluesign standard, the Circuit is a modern choice that balances performance and environmental responsibility. 650+ fill power down provides reliable warmth, while lightweight fabrics allow it to pack down into the included compression sack.

1. Versatile ventilation for any weather
   The wrap-around zip allows the sleeping bag to open fully, including the foot area, so it can be used as a flat quilt on warm nights. When temperatures drop, simply zip it up again and benefit from the warmth trapped by the down insulation and the shaped collar with continuous draught tunnels.
2. Even warmth with no cold spots
   A hybrid baffle construction prevents down from migrating inside the bag, keeping insulation evenly distributed across the entire surface and eliminating cold spots even with long-term use.

• 650+ fill power down insulation, duck down
• ISO 23537 certification for verified thermal performance
• Sleeping bag length 222 cm (Long version)
• Packed volume only 6 litres
• Weight 910 g (Long version, 30 °F)
• YKK #5 zip with anti-snag guide
• Internal zipped pocket for small items
• 100% recycled shell and lining materials
• Soft brushed lining for maximum comfort
• Available versions: Short, Regular, Regular Wide, Long
• Temperature rating: ISO Lower -1 °C / ISO Comfort 2 °C
• Compression sack and storage mesh bag included

Specifications:

Weight: 910 g
Packed volume: 6 l
Sleeping bag dimensions: 222 × 77.5 cm
Packed dimensions: 41 × 22.5 × 15.5 cm
Recommended user height: up to 198 cm (6 ft 6 in)
ISO Lower limit temperature: -1 °C (30 °F)
ISO Comfort temperature: 2 °C (36 °F)
Fill weight: 469 g
Insulation: FP650 duck down 80/20, DWR, RDS
Shell: 100% recycled polyester (20D)
Lining: 100% recycled polyester
Compression sack: 100% recycled nylon
Storage mesh bag: 100% recycled nylon
Zip: left-side, full length, YKK #5

Temperatures: