The Circuit Down Sleeping Bag (-9°C) is a warm, pack-friendly choice for cold-weather camping and backpacking, built around a semi-tapered rectangular shape that feels less restrictive and suits side sleepers. It’s filled with 650+ loft down for efficient warmth without heavy weight, and uses soft, durable fabrics for comfortable nights. A full-length, wraparound zip lets you dump heat quickly when needed, or open the bag completely into a flat quilt for more versatility in camp. With ISO temperature testing and non-PFAS recycled materials, it’s a dependable option when the forecast dips well below zero.

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 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 designed to go the distance