Sea To Summit Spark Pro -1°C Down Sleeping Bag

• Mummy Fit: Fitted cut with generous anatomical footbox and technical hood, to maximise thermal efficiency and minimise bulk and weight
• bluesign®-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

-Primary zip: full-length #5 with zip-plow and two

-Secondary zip: 1/4-length #3 with zip-plow and two

-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

• Fits to: 185cm (Regular), 198cm (Long)
• Shoulder Width: 77.5cm (Regular), 82.5cm (Long)
• Foot Width: 51cm (Regular), 56cm (Long)
• Compression: 8 Litres (both sizes)
• Fill: ULTRA-DRY Goose Down 900+ Loft, RDS certified
• Fill Weight: 310g (Regular), 356g (Long)
• Average Weight: 619g (Regular), 672g (Long)
• Outer Material: 10D nylon
• Inner Material: 10D nylon with a non-PFC DWR finish
• Temperature Rating: 3°C comfort rating woman / minus 1°C Lower comfort rating for men; Temperature rated in accordance with ISO 23537-1:2022