This mattress is the sheer madness .... ^^ Just imagine: My friend and I (both well overweight) use this mattress regularly for several days at festivals, celebrations, etc. and are thrilled! Although we bring together a pretty decent weight (and not just lie still ;-)) the mattress is inflated, for example Fridays and loses nothing, really nothing at air and on days !!! Just great ... No holes, no hassle, no re-inflation! Who wants something vernümpftiges, which should be this hollow, because it does not disappoint! PS: Also the mine's easy.