Our storage beds are designed to be used regularly and are easy to lift. The gas springs in our beds are tailored to the size of the bed and type of mattress. If you are planning to use an existing mattress or are purchasing a mattress from elsewhere that’s fine, our beds are designed to work with all mattress types. However, if it is very heavy, please be aware that the initial lift will be harder than with a standard weight mattress. If you think your existing mattress is very heavy, please contact us for advice.