The Vango Mantis 400 is a lightweight 4-season mummy sleeping bag built around Vango's ThermX insulation system, combining targeted insulation placement, Thermal Reverb aluminised layers and Thermal Embrace elasticated lining to maximise warmth retention while keeping pack weight low. Comfort rated to 0°C with a limit of -6°C and extreme of -20°C, it suits cold-weather camping, trekking and expedition use where thermal performance and packability both matter. DofE recommended, ISO 23537-1:2022 certified, and packs to 29 x 20cm. Might this be more bag than you need? The Vango Mantis 300 Sleeping Bag is the same ThermX construction with the same internal dimensions, comfort rated 3°C instead of 0°C, and saves 100g. Choose this 400 if you camp through winter or sleep cold, and the 300 for spring through autumn. Key Features ThermX Insulation Design - Proprietary construction targets warmth where it is needed most for an improved warmth-to-weight ratio Thermal Reverb Technology - Aluminised fabric layers reflect body heat back towards the user to improve warmth retention Thermal Embrace Lining - Elasticated lining gently contours closer to the body to reduce cold spots without restricting movement Lightweight 4 Season Performance - Designed for cold-weather camping and expedition use with a low overall pack weight 40D Recycled Ripstop Shell - Polair Eco recycled ripstop nylon is lightweight, breathable and water resistant 40D Recycled Ripstop Lining - Soft-touch, tear resistant and highly compressible to reduce pack size Omega Ergonomic Shaping - Positions zips and seams in the lower section of the bag and shapes it around head and shoulders Adjustable Shoulder Baffle - Insulated ergonomic baffle helps retain warmth inside the sleeping bag 2 Panel 3D Hood - Shaped hood design minimises heat loss from the head during cold nights Full-Length Two-Way Auto-Lock Zip - Adjustable ventilation with anti-snag zip guard and insulated baffle Redesigned Ergonomic Footbox - Improves comfort and freedom of movement while reducing heat loss Internal Storage Pocket - Convenient storage for small essentials and valuables Compression Stuff Sack Included - 3-strap compression sack packs the bag to 29 x 20cm DofE Recommended - Suitable for Duke of Edinburgh expedition use ISO 23537-1:2022 Certified - Certified to current industry temperature testing standards How to read the temperature ratings. Comfort 0°C is the figure to plan around: it is the temperature at which a standard adult woman should sleep comfortably. Limit -6°C assumes a standard adult man sleeping curled up, and Extreme -20°C is a survival figure only, never a camping temperature. If you sleep cold, treat 0°C as your realistic lower limit rather than the -6°C headline. Vango's own website publishes only the limit and extreme figures for this bag; the 0°C comfort rating is printed on the bag's internal label. Ideal For Winter Camping - Designed for reliable warmth during cold-weather camping trips and exposed overnight stays Trekking and Backpacking - Lightweight compressible design suitable for multi-day outdoor travel Expedition Use - Advanced thermal performance for demanding outdoor environments DofE Expeditions - DofE recommended, and warm enough for early and late season expedition dates Wild Camping - Compact and packable sleeping solution for remote overnight adventures Technical Specifications Brand Vango Model Mantis 400 MPN SBVMANTIS000003 Product Type 4 Season Mummy Sleeping Bag Season Rating 4 Season Weight 1.44kg Pack Size 29 x Ø20cm Shape Mummy Zip Side Left Shell and Lining 40D Polair Eco recycled ripstop nylon Fill Type 4T Eco - Recycled Synthetic Filling Comfort Temperature 0°C Limit Temperature -6°C Extreme Temperature -20°C Suggested Usage Range -6°C to 15°C Internal Length 205cm Internal Chest Width 78cm Internal Foot Width 48cm External Chest Width 80cm Maximum User Height 190cm Colour Harissa DofE Recommended Yes Certification ISO 23537-1:2022 Certified Guarantee 2 year Vango guarantee, 3 years if registered Warranty Vango covers this sleeping bag with a two year user warranty against manufacturing faults in the fabrics, component parts and workmanship. Register it with Vango within six months of purchase and the cover extends to three years. Keep your receipt, as proof of purchase is needed for an extended claim. Start any claim with us and we will handle the return to Vango on your behalf. Products must be sent back clean and dry, or they may be returned uninspected. The warranty covers normal, intended use. It does not cover general wear and tear, fabric flaws caused by excessive wear, zips broken by forcing or jamming, over-stretched seams coming apart, buckles subjected to undue force, a draw cord pulled out with excessive force, a stuff bag broken through undue force, or reduced loft of the filling over time. Store the bag loose rather than compressed between trips to keep the filling lofting.
