Sea to Summit Spark Pro Ultralight -1 Down Sleeping Bag

Lightweight and functional, the Spark Pro Ultralight -1 Down Sleeping Bag is optimised for comfort and versatility on lightweight adventures. It combines ULTRA-DRY 900+ loft goose down with soft 10D nylon, a mummy shape for efficient insulation and minimal bulk with a Free Flow Zip System for maximum ventilation and the ability to open it out as a quilt. It comes with a compression stuff sack for compact packing.

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• Mummy Fit: Fitted cut with generous anatomical footbox and technical hood, to maximise thermal efficiency and minimise bulk and weight
• bluesign(R)-approved 10D nylon shell and lining fabric offers breathability, protection and effective temperature regulation for premium comfort in the outdoors
• 10D nylon's waterproof and breathable features offer added protection and prevents exposure to tent wall condensation
• 900+ Fill Power, RDS-certified, Goose Down with ULTRA-DRY Down treatment for improved water resistance in damp conditions
• Free Flow Zip System for reliable, snag-free operation and minimal weight:
• Primary zip: full-length #5 with zip-plow and two sliders
• Secondary zip: 1/4-length #3 with zip-plow and two sliders
• Footbox zip: #3 with two sliders
• Hybrid box baffles with vertical chest baffles, horizontal baffles in the lower half and base, box wall baffles at the top half of the bag and sewn through quilted construction in the lower half
• Technical fitted hood with soft touch adjustment, extra deep for cosy-like feel
• Fitted front draft collar: scalloped over the neck and oversized at the shoulders
• Pairs with women's Sea to Summit bags and the QuiltLock System allows integration with Sea to Summit quilts
• Comes with an Ultra-Sil compression bag and a storage cell

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• Sleep fill: ULTRA-DRY Goose Down 900+ Loft, RDS certified
• Sleep temp rating: 3oC comfort rating woman / minus 1oC Lower comfort rating for men; Temperature rated in accorda...