**Product Specifications:**

**Brand:** NatureHike

**Model:** Comfortable M Series Hooded Cotton Sleeping Bag

**Design:** Envelope style, washable

**Models Available:** M180, M300, M400

**Fill Weight:** 180g/m2, 300g/m2, 400g/m2 Cotton Fiber Fill

**Features:** Sleep comfortably with NatureHike; fully expandable for added comfort; breathable and soft 210T spring polyester fabric with high-quality imitation feather cotton fill; washed cotton technology for a soft touch; can be spliced to create a double sleeping bag with left and right zippers

**Basic Parameters:**

- **Color Options:** Pine Green, Rock Gray

- **Size:** (190+30)×80cm

- **Storage Size:** Φ20×43cm, Φ25×43cm, Φ28×45cm

- **Weight:** Approximately 1.2kg, 1.5kg, 1.85kg

**Temperature Ratings:**

- **M180:** Comfort temperature 12°C, Limit temperature 5°C, Extreme temperature -8°C

- **M300:** Comfort temperature 6°C, Limit temperature 1°C, Extreme temperature -13°C

- **M400:** Comfort temperature 1°C, Limit temperature -4°C, Extreme temperature -18°C

**More Details:**

- Two-way zipper with RISI zipper head

- Foot zipper for ventilation

- High-density temperature label

- Non-stick magic tape

- Elastic adjustment buckle

**Care Instructions:**

- Hand wash with neutral detergent or sleeping bag-specific cleaner

- Do not use strong (acidic or alkaline) detergents, bleach, or fabric softeners

- Air dry in a well-ventilated area, avoid direct sunlight

**Storage Tips:**

- Store in a dry, cool place

- Avoid long-term compression, fluff up occasionally to maintain loft

**Usage Recommendations:**

- Before camping, air out the sleeping bag and check for completeness

- In cold environments, pre-warm the sleeping bag with a hot water bottle

- Do not wear thick clothing inside the sleeping bag

**Additional Notes:**

- Sleeping bags are personal items, avoid sharing if possible

Please refer to the product washing label for specific cleaning instructions and maintenance guidelines.