◆ Insulation down to -196 degrees! Revolutionary application of aerogel, a highly insulated sleeping bag is born! MASNLA's sleeping bag incorporates aerogel material, allowing it to withstand temperatures as low as -40 degrees, providing both "warmth" and "softness." ・Aerogel is known as a material that will revolutionize the 21st century. Aerogel is a material used as insulation in spacesuits and is considered the lightest and most highly insulating solid on Earth. ※ For more details, please search for "MASNLA sleeping bag." Size (approx.): Width: Shoulder 82cm Length: 205cm ・Condition... There is a partially melted mark as shown in the 5th image. I have used it about 3 times, but I think the condition is not bad. ※ Please refrain from bidding if you are a nervous person, as this is a used item. We appreciate your understanding and only ask that you bid if you can accept this. If you are interested in the MASNLA sleeping bag, why not purchase it at this opportunity? Thank you very much.