Deflated it has a small size and is easy to carry therefore. But inflated it's very thin and inflating it manually doesn't make it much better. Also the mattress started losing air after 3 days of use. Will have to return it unfortunately.
Thanks for your feedback on the Forclaz A200 mattress. I will pass your comments on to the product manager of this category. When you pop back into store for a refund, I would recommend looking at this version (https://www.decathlon.co.uk/forclaz-air-inflatable-camping-sleeping-mat-red-50cm-id_8298497.html). It is slightly more expensive however much more comfortable and smaller and lighter to pack. Chris Allen UK Market Manager DECATHLON