The Sea to Summit Spark Pro Ultralight Sleeping Bag is the perfect option for lightweight adventures that puts comfort at the forefront. With the ability to be adapted to a range of conditions, the Spark Pro is as lightweight as it is versatile and functional. The optimal warmth to weight ratio makes this bag as comfortable as it is compact and easily packable.
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
Best Use: Ultralight Backpacking
Comes With: Ultra-Sil compression bag and storage cell
Specifications:
Insulation: Ultra-Dry Goose Down 950+ Loft
Material(s): 10-Denier Nylon shell and lining.10-Denier Nylon waterproof-breathable hood and footbox.
Shape: Mummy Fit: Fitted cut with generous footbox and technical hood
Zip Options: Left-side #3 YKK zipper
950+ Loft Ultra-Dry Down: The highest-lofting down used in any of Sea to Summit’s sleeping bags or quilts. 950+ Fill Power indicates that one ounce (30g) of down will re-expand to over 950 cubic inches after compression. Higher loft means that less down can be used to achieve the same temperature rating – important for performance sleeping bags. The loft and down quality/composition are independently tested by the International Down and Feather Laboratory (IDFL) – a copy of the certification is supplied with every Sea to Summit sleeping bag. The down is responsibly sourced and RDS certified and treated with Sea to Summit's non-PFC Ultra-Dry Down™ treatment.
Free Flow Zip: The Free-Flow triple-zip design ensures your sleeping bag retains maximum warmth and efficiency when needed and multiple ventilation options when it's not. The half-zip on the right side of the bag (left side on women's bags) provides freedom of movement for both arms, additional ventilation and allows the top third of the bag to be folded down as a mini quilt when the mercury climbs higher than expected.
QuiltLock System: The QuiltLock system uses the snap locks located at the shoulder and foot end of Sea to Summit sleeping bags plus the quilt footbox / quilt straps to secure a quilt to the sleeping bag. This adds thermal performance and versatility to your sleep system: your integrated quilt now works for ultralight summer adventures and turns your three-season bag into a four-season sleep system.
Responsible Down Standard (RDS): 100% of the down used in our sleeping bags and quilts is independently certified to the Responsible Down Standard (RDS). The RDS certifies down against animal welfare requirements and tracks it from the source to the final product. The purchase of RDS certified products demonstrates demand for better animal welfare practices in the down and feather supply chain. Sea to Summit is certified to the RDS.
Non-PFC Treatment: Ultra-Dry Down is a non-PFC treatment hydrophobic treatment applied to the down during down processing. It is not a coating (which would reduce the ability of the down to loft), it comprises of very small particles of a polymer that cause the down clusters / feathers to repel water. Hydrophobic down is not waterproof; but it absorbs less water than untreated down and dries much more quickly.
Ultra-Dry Down does not affect the loft or lifespan of the down, or its breathability. The treatment will last through at least 20 washings.