Self Inflating Mattress Won't Inflate!!!!!!!!!

[magnolia1]

Ok bought them off ebay and going camping on Monday. They inflate to about 2cm but should be 5cm. No punctures so whats wrong, tried a pump but didn't really help!!!

Bump!!!!

The first time you use them they should be left to expand overnight. Then they are quicker.

Ok will do that thanks

You do also need to give them a few good blows the first time - and be careful not to let the air back out.

I did that with the extra breath but they really are not inflating They inflate in the corners but there are parts that are still almost flat.