The Quallität the envelope is fine. The opening is located on the short side. So far so good... If the specified dimensions of 1450 x 200 x 2300 I assumed that a 1.40 mx 200 mx 15 cm Mattress fits. This is not true !! The huele is laid flat, only 150 cm wide. Since the mattress did I pack 1.40 m wide and 15 cm thick, ie, a "cross-section circulation" has 3.10m, the shell did not fit. I had of course only after the Unpacking bemert so that I could not return the envelope. The 1.60 m wide envelope would have been perfect.