This is a sleeping bag from Bears Rock (ベアーズロック). One is completely unused, and the other has been used indoors (likely unwashed), but it's unclear which is which. I am selling this on behalf of someone else. I have it in my possession and will handle the listing. I am not familiar with outdoor activities and cannot answer detailed questions. I am also keeping them stored as is, as I don't want to unpack them and risk not being able to repack them. Looking at past listings for the same model, a set of two used ones was listed for 8000 yen (shipping at buyer's expense). Since it's unclear which one is used, I'm offering this one for 8000 yen, including shipping. 4-Season FX-402 -15 Degree Sleeping Bag, Mummy Type, 4-Season FX-402 When open: (approx.) 230cm x 80cm When stored: (approx.) 40cm x 27cm Weight: (approx.) 1.75kg Outer fabric: 300T polyester Filling: BR Warm 3D hollow fiber Inner fabric: Absorbent, fluffy polyester Suitable seasons: 4 seasons (spring, summer, autumn, winter) Comfort temperature: 20°C to 0°C Extreme temperature: 0°C to -15°C