Most beds in the 21st century consist of the bed framework as well as the mattress, with the bed resting on top of a strong foundation made of either a sprung foundation or timber slats. Many contemporary beds additionally consist of the option from a head board for relaxing from as well as medical beds can easily also consist of side rails and sometimes both kinds of bedrooms also include footboards. Bedrooms that possess headboards also usually possess mattress skirts which double up as dust covers that both shield and also hide the real bed structure under the bed mattress.