The RDS 850+ Loft premium goose down, light-gauge #3 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 DownT 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 DownT protection also makes the SparkT an impressive hard-alpine or adventure racing bag, where every gram is counted and down has never been a viable option.Ultralight 7D and 10D fabrics for minimal weight and packed size. RDS 850+ Loft Premium Goose ULTRA-DRY DownT for maximum insulation value. Contoured mummy shape for comfort and efficient insulation. Vertical chest baffles prevent down migration and cold spots. Sewn through construction minimises weight.
Sewn through vertical baffles on chest optimises position of down to prevent it moving during use. ½ zip with single slider aids access while keeping weight to a minimum. Updated sizing provides extra room for both shoulders and hips while still maintaining insulation efficiency. Includes lightweight Ultra-SilT Nano compression bag for compact storage. Super-compressible and lofty RDS 850+ Ultra-DryT technical Down insulation.
Ethically Sources RDS Certified down insulation. 3D hood draws in tight when needed. Supplied with stuff sack and storage cell. Primary Filling Material: Goose Down Min.Stuffsack: 100% Nylon excluding Trims. Temperature ratings conform to EN13537 standards. Compression Sack Volume - compressed: 1.5L. Lower Limit: 5°C / 40°F. 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. 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. Lower Limit: The temperature at which a standard man can sleep for eight hours in a curled position without waking.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. The Corps Shop is an Authorised Distributor of Sea to Summit® products and equipment.This item is in the category "Sporting Goods\Camping & Hiking\Outdoor Sleeping Equipment\Sleeping Bags". The seller is "sfor8673" and is located in this country: AU. This item can be shipped worldwide.