Soft, warm fill: Interior is filled with fluffy hollow cotton that provides insulation and a comfortable, cushioned sleep surface. Temperature performance: Available in sizes S and L and rated for cooler conditions with suitability in the ranges 15–20°C and 0–5°C, making it appropriate for winter camping or use in cooler climates. Head and draft protection: Builtin hood keeps your head warm; a side drawstring seals the bag to reduce cold air entry and retain body heat overnight. Easy access and ventilation: Twoway zipper lets you open the bag from the inside or outside for quick ventilation, temperature control, or emergency exit. Convertible design: Fully unzip and open flat to use as a blanket when you need a larger covering or a ground layer. Versatile use: Designed for outdoor and indoor use — suitable for camping, hiking, backpacking, and as an extra sleeping pad or blanket at home. Practical use scenarios Winter campsite overnight: Use the L size at lower temperatures (around 0–5°C) to maximize insulation and keep head and torso protected from chill. Cool spring/autumn trips: Use the S or L size in milder conditions (around 15–20°C) and adjust ventilation with the twoway zipper and hood as temperatures change. Indoor guest or travel: Open flat as a blanket or place on a mattress as a quick sleeping pad for visitors or hostel stays. What you get Lightweightfeeling hollow cotton fill for softness and warmth Twoway zip for flexible ventilation and easy exit Hood and side drawstring to reduce drafts Convertible sacktoblanket functionality Two size options (S, L) covering the specified temperature ranges This sleeping bag delivers practical warmth, easy temperature control, and multipurpose use without extra complexity.