Spark Pro Down Sleeping Bag The Spark Pro has been optimised for comfort, versatility and light weight. Our highest-lofting down - 900+ fillpower RDS-certified goose down with a non-PFAS Ultra-Dry Down treatment - is wrapped in extremely breathable 10D fabrics. The Free-Flow Zip system ensures maximum ventilation and the flexibility to open the bag flat as a quilt. Zip a Spark Pro to a Women's Spark and share the comfort with your companion. Tech Specs Materials Shell: 100% nylon Lining: 100% nylon Down Fill: 90/10 Goose Down Stuff Sack: 100% nylon - excluding trims Insulation RDS certified, 900+ fillpower goose down with a non-PFC Ultra-Dry Down treatment Specifications by Temp Rating & Size Temp Rating / Size Weight Packed Weight Dimension Packed Size Compressed Volume Length Recommended User Height Fill Weight Temp Rating ISO Lower Temp Rating ISO Comfort 30°F / Regular 619 g | 21.8 oz 684 g | 24.1 oz 196 x 77.5 cm | 77 x 31 in 34 x 19.5 x 13.5 cm | 13 x 8 x 5 in 5.3 L 196cm | 77in 185 cm | 72.83 in 310 g | 10.93 oz -1 °C | 30 °F 3 °C | 37 °F 30°F / Long 672 g | 23.7 oz 737 g | 26.0 oz 211 x 82.5 cm | 83 x 32 in 34 x 19.5 x 13.5 cm | 13 x 8 x 5 in 5.5 L 211cm | 83in 198 cm | 77.95 in 356 g | 12.56 oz -1 °C | 30 °F 3 °C | 37 °F 15°F / Regular 784 g | 27.7 oz 862 g | 30.4 oz 196 x 77.5 cm | 77 x 31 in 41 x 22.5 x 15.5 cm | 16 x 9 x 6 in 7 L 196cm | 77in 185 cm | 72.83 in 480 g | 16.93 oz -9 °C | 16 °F -3 °C | 27 °F 15°F / Long 861 g | 30.4 oz 939 g | 33.1 oz 211 x 82.5 cm | 83 x 32 in 41 x 22.5 x 15.5 cm | 16 x 9 x 6 in 7.7 L 211cm | 83in 198 cm | 77.95 in 504 g | 17.78 oz -9 °C | 16 °F -3 °C | 27 °F Key Features RDS-certified, 900+ fillpower goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance Featherweight 10D nylon shell with non-PFAS DWR, and a highly breathable 10D nylon liner for enhanced comfort Technical hood, anatomical footbox and an ergonomic mummy shape - ultralight doesn't have to mean ultratight Free-Flow Zip System: YKK #5 side zipper with zipper plough for reliable, snag-free operation. YKK #3 footbox and shoulder zipper for minimal additional weight Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout Front draft collar is fitted around the neck and oversized at the shoulders to retain warmth Available Options Temp Rating 30°F 15°F Size Regular Long Features: - Free-Flow Zip System: YKK #5 side zipper with zipper plough for reliable, snag-free operation. YKK #3 footbox and shoulder zipper for minimal additional weight