The Spark sleeping bag prioritises comfort for lightweight adventures. This sleeping bag offers an optimal warmth-to-weight ratio and utilises 850+ fill power-down insulation for exceptional comfort in a compact and easily packable design. Constructed with 10 Denier Nylon and 10D Nylon, these lightweight fabrics provide breathability, protection, and effective temperature regulation for premium comfort during outdoor excursions.The 10D Nylon fabric also offers waterproof and breathable properties, enhancing protection and preventing exposure to condensation on tent walls. The Mummy Fit design of the sleeping bag maximises thermal efficiency and heat retention while maintaining a lightweight profile, ensuring warmth, compactness, and comfort outdoors. Sea To Summit Spark -9C Regular Sleeping Bag | George Fisher