The thickness of the mattress is not as advertised, maybe in time _ I just opened it now- it will be better. The outside of the mattress is designed to big, and the material is quite plasticky. One of the seams of the outside is already coming out. The method of fabrication is strange: it is a large piece of approximately 80 cm, to which they added 10 cm on each side...it is not an entire piece of 100 cm width.