For a lightweight sack that doesn’t backtrack on cold-weather comfort, sleep soundly at the summit with the Spark Women’s -1C Down Sleeping Bag by Sea to Summit.

An RDS certified 850+ FILL Power goose down provides both comfort when unpacked and a compact pack down, treated with ULTRA-DRY down water-repellent to protect from moisture on the damper days off the grid. A -1°C comfort rating and -7°C lower limit also has it suitable for sub-zero climates. Featuring a Mummy Fit that is both wider at the hips and narrower at the shoulder for thermal efficiency and minimal weight, the Spark Women’s -1C boasts a women-specific fit and heat retention technology. Its 10D Nylon construction in the shell, lining, hood, and footbox also offers lightweight breathability and resistance to both water and tent condensation on every outdoor retreat.

Vertical and horizontal chest baffles are present in both the lower-half and base, while box wall baffles exist at the top-half of the bag and run through the quilted construction of the lower-half, minimising cold spots for a warm sleep. A durable half-length #5 side zipper features a zip plow with two sliders, while the standard front collar draft helps to trap heat and the technical hood offers a soft-touch adjustment – sitting deep for a cosy cold-weather camping experience. Owing to the Quiltlock system and drawcord footbox – be fierce, wild, and free owing to the added compatibility and functionality of pairing securely with the separately available unisex Sea to Summit quilts too.

For the girls of the gradient, keep as fast and light as you are comfortable at night, in the Spark Women’s -1C Down Sleeping Bag by Sea to Summit.

• -1°C Comfort rating, -7°C Lower Limit rating
• 10D Nylon shell and lining
• 10D Nylon waterproof, breathable hood and footbox
• Standard front draft collar
• Vertical chest and horizontal chest baffles in lower half and base
• Box wall baffles at top-half of bag and sewn throughout lower-half quilted construction
• Mummy Fit for maximum thermal efficiency and minimal bulk/weight
• Wider at hips and narrower at shoulders for optimal, women-specific fit and heat retention
• Half-length #5 zipper with zip plow and 2 x sliders
• RDS certified 850+ FILL Power goose down for comfort and compact packing
• ULTRA-DRY down water-repellent treatment for water resistance
• Compatible with separately available Sea to Summit quilts
• Quiltlock system and drawcord footbox for compatibility with unisex Sea to Summit bags
• 5L compression bag included