The Naturehike Penguin Cotton Sleeping Bag is engineered for serious cold-weather camping. Available in two fill densities — P300 (300g/m²) and P400 (400g/m²) — it uses a down-cotton mixture fill (cotton base, down top layer) that delivers exceptional warmth-to-weight performance. The polyester pongee outer and washed cotton lining create a durable, skin-friendly shell that holds up across seasons.
Rated temperatures are precise and tested: P300 is comfortable to 6°C, with a limit of 1°C and extreme rating of -13°C. P400 pushes further — comfortable to 1°C, limit -4°C, extreme -18°C. At (190+30) × 80 cm, the extended footbox accommodates adults up to 1.8 m with room to spare.
| Specification | P300 | P400 |
|---|---|---|
| Brand / Model | Naturehike NH21MSD03 (Penguin) | |
| Style | Mummy | |
| Filling | Down-Cotton Mixture (Cotton Base + Down Top) | |
| Outer Fabric | Polyester Pongee (Nylon) | |
| Lining | Washed Cotton | |
| Fill Density | 300g/m² | 400g/m² |
| Weight | 1.5 kg | 1.85 kg |
| Packed Size | Ø25 × 36 cm | Ø28 × 38 cm |
| Comfort Temp | 6°C / 42.8°F | 1°C / 33.8°F |
| Limit Temp | 1°C / 33.8°F | -4°C / 24.8°F |
| Extreme Temp | -13°C / 8.6°F | -18°C / -0.4°F |
| Unfolded Size | (190+30) × 80 cm | |
| Splicing | Yes – single or double configuration | |
| Applicable Users | Adults (up to 1.8 m) | |
| Color | Grey | |
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