I weigh about the same as an average mastiff or Saint Bernard, so I reclined on each mattress for five to ten minutes, being attentive to how delicate it was, whether I could truly feel the ground beneath me, And exactly how the duvet materials felt on my skin. Sturdiness: https://johnathancqakr.bloggazza.com/32684413/the-2-minute-rule-for-dog-beds