Ultralight Down Sleeping Bag – 800FP Duck Down, 7D Nylon DWR, Mummy Style Designed for backpackers, hikers, and outdoor adventurers who refuse to compromise on warmth or weight, this ultralight mummy sleeping bag combines premium 800FP duck down insulation with a soft, durable 7D Nylon DWR shell. Whether you're camping in spring, trekking through autumn forests, or pushing into cold winter nights, this sleeping bag delivers reliable thermal performance in a compact, packable form. Key Features 800FP Duck Down Insulation: High fill-power down provides an exceptional warmth-to-weight ratio and outstanding compressibility — packing down small without sacrificing heat retention. 7D iFlex Nylon DWR Shell: Ultra-thin, water-repellent ripstop nylon outer shell is lighter and softer than standard nylon, with a skin-friendly inner lining that feels comfortable against bare skin. Mummy Cut Design: Anatomically shaped to fit close to the body, reducing dead air space and maximising thermal efficiency throughout the night. Spliceable Design: Regular and Lengthen versions of the same series can be zipped together to create a double sleeping bag — i for couples or those who prefer extra room. 4-Chamber Hood: Maintains even loft around the head for consistent warmth in cold conditions. 3D Contoured Footbox: Anatomically shaped to follow the natural foot position, maximising warmth and comfort at the extremities. Draft Collar & Baffle System: Insulated draft collar and anti-clip zipper baffle prevent warm air from escaping and cold air from entering. Down-Filled Face Gasket: Cinch-adjustable hood opening blocks drafts at the face for added warmth in exposed conditions. Dual Compression Sacks Included: Comes with an ultralight compression sack and a mesh storage bag for long-term loft preservation. Product Specifications Specification Details Insulation 800FP Duck Down (Water-Repellent Treated) Shell Fabric iFlex 7D Nylon Ripstop DWR Lining Fabric iFlex 7D Nylon SoftTouch Style Mummy Seasons 3-Season (Spring, Autumn, Winter) Applicable Users Adults (Men & Women) Spliceable Yes (Regular + Lengthen of same series) Down Fill Ratio 60/40 Size & Weight Guide Variant Fill Weight Bag Weight Compression Sack Packed Size Dimensions Dusk Light – Regular 190g 390g 42g 12 × 21 cm 190 × 78 cm Dusk Light – Lengthen 210g 432g 42g 12 × 21 cm 210 × 82 cm Dusk – Regular 325g 540g 50g 15 × 27 cm 190 × 78 cm Dusk – Lengthen 376g 613g 50g 15 × 27 cm 210 × 82 cm Dusk II – Regular 436g 651g 55g 18 × 30 cm 190 × 78 cm Dusk II – Lengthen 500g 737g 55g 18 × 30 cm 210 × 82 cm Note: If your height exceeds 175 cm (5'9"), choose the Lengthen version for optimal comfort. Temperature Ratings (EN Standard) Variant EN Comfort EN Limit Dusk Light +10°C / 50°F +5°C / 41°F Dusk +4°C / 38°F -2°C / 28°F Dusk II +1°C / 34°F -4°C / 25°F As a general guide, the EN Limit rating applies to men and the EN Comfort rating applies to women. Who Is This Sleeping Bag For? Backpackers & Thru-Hikers who need maximum warmth at minimum weight Campers seeking a reliable 3-season sleeping bag for spring, autumn, and mild winter use Couples who want to splice two bags together for a shared double sleeping system Tall Adventurers (over 175 cm) who need the Lengthen option for a proper fit Ultralight Enthusiasts building a gram-conscious kit without sacrificing warmth Why Choose This Ultralight Down Sleeping Bag? Most sleeping bags force a trade-off between warmth, weight, and packability. This bag eliminates that compromise. The 800FP duck down insulation delivers serious thermal performance in a package that compresses to the size of a water bottle. The 7D DWR nylon shell resists moisture while remaining feather-light and skin-soft. Whether you're camping in the Scottish Highlands, the Canadian Rockies, the Alps, or the Australian bush, this sleeping bag is engineered to keep you warm, comfortable, and well-rested — night after night. Package Contents 1 × Ultralight Down Sleeping Bag 1 × Ultralight Compression Sack 1 × Mesh Storage Bag