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eBay SEA TO SUMMIT® SPARK-4 ASP4 Compact Down Sleeping Bag Ultra-light and technical, the Spark™ Series bags by Sea To Summit are designed to keep you as warm as possible while minimising packed weight and size. The Spark™ Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible. The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose down, Medium-gauge #5 YKK zip and high performance 10D Nylon shell and 7D lining fabrics, set the stage for superior performance. These materials are combined with a contoured mummy design for efficient insulation, and that mummy design is then tweaked for each model to best fit the use scenario. Our ULTRA-DRY Down™ water-repellent treatment protects the down from external moisture and condensation from the inside of the bag, virtually eliminating the negative effects moisture has on down. All Sea to Summit Down Sleeping Bags use Responsible Down Standard (RDS) certified down. The ULTRADRY Down™ protection also makes the Spark™ an impressive hard-alpine or adventure racing bag, where every gram is counted and down has never been a viable option. Filled with <620g of compressible and lofty 850+ Ultra-Dry™ down, the Spark-IV will keep you warm and comfortable. See our full range of Sea To Summit outdoor products here in our ebay store Ultralight 7D and 10D fabrics for minimal weight and packed size RDS 850+ Loft Premium Goose ULTRA-DRY Down™ for maximum insulation value Contoured mummy shape for comfort and efficient insulation Vertical chest baffles prevent down migration and cold spots Vertical box baffles in the torso area accommodates extra down and boosts warmth around the core, vertical baffles on chest optimises positions of down to prevent it moving during use Uses a full box baffle construction to accommodate extra down and reduce cold spots Full side zip with single slider aids access while keeping weight to a minimum Draft tube prevents heat loss through the zipper Includes hood draft collar Updated sizing provides extra room for both shoulders and hips while still maintaining insulation efficiency Includes lightweight Ultra-Sil™ Nano compression bag for compact storage Super-compressible and lofty RDS 850+ Ultra-Dry™ technical Down insulation Ethically Sourced RDS Certified down insulation Shell: 100% Nylon Lining: 100% Nylon Primary Filling Material: Goose Down (Min. 90% Down) Stuffsack: 100% Nylon excluding Trims Temperature ratings conform to EN13537 standards Dimensions (Regular): Recommended user height: <183cm Compression Sack Volume - compressed: 6.6L Weight: 880g Fill Weight: 620g Internal Chest Circumference: 150cm Internal Hip Circumference: 130cm Internal Foot Circumference: 88cm Comfort rating: -8°C / 18°F Lower Limit: -15°C / 5°F Extreme: -36°C / -33°F See our full range of Sea To Summit outdoor products here in our ebay store About Ultra-Dry Down: ULTRA-DRY Down is a permanent* Nano-level water repellent polymer treatment applied to our high loft, high quality down. The Nano-thin treatment vastly improves our downs reaction to water without effecting its weight or loft performance. ULTRA-DRY Down retains over 60% more loft and absorbs 30% less moisture when compared with untreated down. Sea to Summit sleeping bags dry out 60% faster than bags with untreated down. The Nano-level treatment also inhibits bacterial and microbial growth, which makes Sea to Summit sleeping bags more hygienic and improves their lifespan. *No loss of treatment effect has been seen in over 14 wash cycles. About EN13537 Temperature Rating System: Although the EN13537 standard does not identify a single precise temperature a tested sleeping bag is suitable for, it does provide an industry standardised temperature range that a typical user can refer to as a guide for the conditions their bag will be most comfortable in. The EN13537 standard provides three temperature levels to guide a consumer in their choice: Comfort: The temperature at which a standard woman can expect to sleep comfortably in a relaxed position. If you consider yourself a cold sleeper use this rating to decide the coldest temperature the sleeping bag is suitable for. Lower Limit: The temperature at which a standard man can sleep for eight hours in a curled position without waking. If you consider yourself a warm sleeper you can use this rating to decide the coldest temperature the sleeping bag is suitable for. Extreme: This is a survival only rating for a standard woman. Between the lower limit and the extreme rating a strong sensation of cold has to be expected and there is a risk of health damage due to hypothermia. This is an extreme survival rating only, we do not recommend you rely on this rating for general use. The EN13537 temperature tests use a thermal manikin with heaters and temperature sensors to measure the insulation value of a sleeping bag. This manikin is wearing one layer of long underwear and is placed inside the sleeping bag on an insulating mat. The test is conducted in a temperature controlled chamber and a range of comfort temperatures are derived from measuring the energy required to maintain homeostasis in the manikin to a set temperature. All Sea to Summit sleeping bags have been tested to the EN13537 standard. We recommend you use our EN13537 quoted ratings as a guide and a comparative reference to other EN13537 tested bags. These items are now in stock and ready to ship immediately. Ultra fast shipping service, get it yesterday! The Corps Shop is an Authorised Distributor of Sea to Summit® products and equipment. Yes, we will combine shipping on multiple purchases. Yes, we ship to PO Box, Parcel Locker, APO, FPO and AFPO Addresses Be sure to add me to your favourites list!
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