The height of a mattress does not typically factor into quality of product. However, there are certain limitations or benefits to each depth. You see, this mattress would not be suitable for a bunk bed because it is too thick and would represent a danger to children at risk of falling out of their bed due to the now-too-low railings. With a height of 26cm this mattress is ideal for standard sized sheets meaning you don't need to replace your bedding with extra deep sheeting and as an added piece of confidence, 26cm is plenty of room for good quality components. Anecdotally, many have experienced the discomfort caused from a mattress so thin you can feel your back against the slats.