The Sea to Summit Circuit Down Sleeping Bag (-1°C) is a lightweight and versatile sleeping bag designed for two-season backpacking, camping, and travel. Filled with 650+ fill power Ultra-Dry duck down and built with recycled 20D fabrics, it delivers reliable warmth with excellent packability. Its semi-tapered rectangular shape and wrap-around zip provide enhanced comfort and adaptable ventilation in changing conditions.

Features

• Lightweight two-season sleeping bag ideal for hiking, camping and travel

• 650+ fill power Ultra-Dry duck down insulation for dependable warmth in damp conditions

• Semi-tapered rectangular shape offers more space and comfort than traditional mummy bags

• Wrap-around zip allows adjustable ventilation or full quilt-style opening

• Footbox can fully open for maximum airflow during warmer nights

• Hybrid box baffle construction prevents down migration and eliminates cold spots

• Lightweight 20D recycled polyester shell fabric with non-PFC DWR finish

• Soft recycled 20D polyester lining for improved comfort against the skin

• Shaped collar and continuous down-filled draft tubes minimise heat loss

• YKK #5 coil zipper with anti-snag plough ensures smooth operation

• Internal zippered pocket stores essentials securely and keeps them insulated

• ISO 23537 temperature rating certification for reliable performance

• Includes compression sack and storage sack made from recycled materials