Robens Spire III -9°C Sleeping Bag | Lightweight 3-Season Mummy Bag

Serious Warmth for Cold-Weather Adventures The Robens Spire III -9°C Sleeping Bag is the warmest model in the Spire range, designed for demanding cold-weather camping, mountain adventures, and shoulder-season expeditions. Combining a thermally efficient body-contoured profile with OneThermo® synthetic insulation, the Spire III delivers impressive warmth while remaining practical and reliable in damp conditions. A 3D hood, redesigned neck baffle, insulated zip baffle, and insulated shark fin foot box work together to trap heat and minimise cold spots, helping you stay comfortable when temperatures drop well below freezing. Why You'll Love It Maximum Warmth in the Spire Range → Comfort rated to -3°C and limit rated to -9°C Cold-Weather Ready → Ideal for late autumn, winter, and mountain conditions Performs When Damp → Synthetic insulation retains warmth in condensation and humid environments Heat-Retaining Design → Body-contoured shape minimises dead air space Built for Adventure → Durable materials and practical features throughout OneThermo® Synthetic Insulation The Spire III features OneThermo® insulation, offering: Excellent thermal performance Reliable warmth in damp conditions Fast drying characteristics Long-lasting loft retention Durability for frequent outdoor use Perfect for UK winter camping and colder mountain environments where moisture resistance is essential. Temperature Ratings Comfort: -3°C Limit: -9°C Designed for: Winter camping Cold-weather backpacking Mountain camps Late autumn and early spring trips Wild camping in exposed conditions Key Features 3D Hood Profile → Improves warmth and comfort around the head Redesigned Neck Baffle → Reduces heat loss and cold draughts Differentiated Hood Drawcords → Easy adjustment by touch in low light Shark Fin Foot Box → Extra insulation around the feet Full-Length Insulated Zip Baffle → Minimises heat loss through the zip YKK Auto Lock Two-Way Zip → Reliable operation and adjustable ventilation Anti-Snag Zip Guard → Smooth opening and closing Brushed Polyester Lining → Soft-touch comfort with excellent moisture transport Internal Pocket → Secure storage for valuables Compression Stuff Sack Included Hanging Loops for Drying & Storage PFAS-Free Construction Specifications Weight: 1685g Packed Size: 36 × 24 cm Shell Fabric: 50D 300T Polyester Taffeta Insulation: OneThermo® Lining: 230T Microfibre Polyester Zip: YKK Auto Lock Two-Way Zip Materials: Shell: 100% Polyester Lining: 100% Polyester Filling: 100% Polyester Perfect For Winter Camping Wild Camping Backpacking Trekking Mountain Expeditions Bikepacking Cold-Weather Adventures Spire Range Comparison Robens Spire I -1°C Sleeping Bag → Lightweight three-season performance Robens Spire II -4°C Sleeping Bag → Enhanced warmth for cooler conditions Robens Spire III -9°C Sleeping Bag → Maximum warmth and cold-weather protection Spire I = Lightweight & compact Spire II = Versatile all-rounder Spire III = Warmth & protection