Sea to Summit Circuit Down Sleeping Bag -1°C

Designed with comfort and versatility at its core, the Sea to Summit Circuit is the perfect companion for every kind of overnight adventure. Whether you're settling into a tent at the campsite, heading into the hills for a weekend escape, or bedding down in the van after a long day outdoors, the Circuit delivers dependable warmth and a comfortable night's sleep. Combining practical performance with everyday ease of use, it's an ideal sleeping bag for campers, hikers, and van-lifers alike. This bag has a relaxed fit which opens flat for airflow on warm nights, or zips closed to lock in warmth when temperatures drop.

Pair up your Sea to Summit sleeping bag with a compatible liner for the ultimate sleep system. Sleeping Bag Liners

More Help? For further assistance on choosing your down sleeping bag, we have an article explaining fill power, the pros and cons of down over synthetic insulation and more info on caring for your bag available to view here: A Guide to Down Sleeping Bags.

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 Soft touch liner and wider, thermally-efficient shape enhance warmth and comfort, no matter which position you sleep in.
  
• Precise ventilation. Wrap‑around zip lets you fully open the footbox for maximum venting and fine-tune airflow to regulate temperature.
  
• Lightweight breathability, Premium 20D fabric offers perfect next-to-skin comfort night after night after night.
  
• 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 Zipped 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 designed to go the distance.
• Shape: Semi-rectangular fit: Spacious and generous, a roomy fit for car camping and side sleepers.
  

Specification 

• Best Use: All Outdoor activities
• Maximum User Height:  Short: 170cm / Regular: 185cm / Long:  198cm
• Comfort Temperature: 3°C
• Comfort Temperature limit: -1°C
• Shoulder width:  Short: 145cm / Regular: 158cm / Long: 168cm
• Waist With: Regular: Short: 140cm / 146cm / Long: 156cm
• Foot box width:  Short: 98cm / Regular: 119cm / Long: 129cm
• Insulated collar: Yes
• Shell Fabric: Recycled 20-Denier shell and lining.
  
• Filling: Ultra-Dry duck down
• Fill power: 650+
• Weight: Short: 770g / Regular 820g / Long: 910g
• Fill Weight: Short: 384g / Regular 411g / Long: 469g
• Compression Size: Short: 5.1L / Regular 5.4L / Long: 6L
• Zip: Left