Why does the hotel bed sag in the middle?

Because people rest in the middle of the bed.

Body temperature, sweating, weight, put on it for a long time, naturally appear concave. Too thin spring, poor spring material and too long use time will all lead to the decline of spring elasticity. We were lying in a place on the mattress, and the mattress was stressed the most, causing the middle to collapse. In addition, the main materials of the filler are sponge, memory cotton, latex and so on. The density of these fillers is not enough, which leads to insufficient crushing force, easy deformation and collapse in the middle.

General spring beds will have such problems, especially affecting sleep. Our family now uses a mattress with Lord's flying wings. It is not supported by springs, but by a row of skeleton support systems. Aviation materials have good elasticity and will not collapse. Mainly to protect the spine, but also to adjust the hardness, especially human.