Sea to Summit Ascent -1C Down Sleeping Bag Regular rain forest green

A three-season backcountry bag built for variable conditions, with moisture-resistant down and convertible ventilation.

The Sea to Summit Ascent -1°C is a men's mummy-cut sleeping bag rated for shoulder-season cold through warm summer nights. RDS-certified 750+ fill-power goose down with a non-PFC Ultra-Dry Down treatment maintains loft in damp conditions. The Free-Flow Zip system opens the bag into multiple configurations — including fully flat as a quilt — and snap closures at the shoulders allow it to be worn as a camp jacket.

Features

• RDS-certified 750+ fill-power goose down with non-PFC Ultra-Dry Down treatment for moisture resistance

• Free-Flow Zip system — fully closed, partial vent, or fully open quilt mode

• Snap closures at shoulders for use as a camp jacket

• Box baffle construction with vertical torso baffles to minimise down shift

• 20D recycled nylon shell and liner with non-PFC DWR finish

• Zip-couple compatible with Sea to Summit Women's bags

Technical Specifications

• Temperature rating: -1°C comfort / +3°C limit

• Insulation: RDS-certified 750+ fill-power Ultra-Dry Down (goose), PFC-free treatment

• Shell and lining: 20D recycled nylon

• Shape: Mummy

• Fit: Men's Regular (fits to 185 cm body length)

• Packed dimensions: 158 × 146 × 119 cm

• Weight: 782 g