Thank you for viewing. This is a waterproof accordion mat DX, extra thick 30mm. I bought it for camping and car camping. I've used it about 10 times and then stored it away. Famous brands like Therm-a-Rest sell many closed-cell mats with various performances, but I think the comfort and insulation ultimately depend on the thickness of the mat. When camping, I found it easy and comfortable to bring this mat and a Therm-a-Rest Z Lite Sol and use them together. Even for car camping, with this much thickness, you can adjust the layering to fill in the gaps in the seats. I don't think there are any noticeable signs of deterioration, dirt, or damage, but there are some dents and scratches from when I bought it. ・Please read the profile section to ensure a smooth and pleasant transaction for both parties. The following is from the internet: Product size: Approximately 600x1800x30mm (measured at the maximum size of the unevenness) Storage size: Approximately 600x195x200mm Material: Foamed PE, aluminum PE film Weight: Approximately 710g Country of origin: China