Sea To Summit Spark Pro -1C  Down Sleeping Bag - Long Features: 950+ FILL Power, RDS-certified, Goose Down with Ultra Dry Down treatment for improved water resistance in damp conditions Featuring 10-Denier Nylon shell and lining fabric, these lightweight fabrics offer 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. Mummy Fit: Fitted cut with generous footbox and technical hood, to maximise thermal efficiency and minimise bulk and weight. Free Flow Zip System: 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. Spark Pro -1 Vertical chest baffles, horizontal baffles lower half and base, box wall baffles top half of bag and sewn through quilted construction lower half. Spark Pro -9 Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout. Fitted front draft collar: scalloped over the neck and oversized at the shoulders. Technical fitted hood with soft touch adjustment. Extra deep for cosy like feel. Pairs with Women's Sea to Summit bags. QuiltLock System integrates with STS quilts   Spark Pro -1C Down Sleeping Bag - Long