Sofa bed new experience:Older sofa beds are supported by bottom springs and fabrics, and you can feel the discomfort and lack of support from the back springs while sleeping.Sofa bed support boards can be a good solution to this problem! Simply place it on top of the sofa bed to solve the problem of sagging and springs due to insufficient support and improve the quality of sleep. NEW FABRIC : The support board is made of 600D Oxford cloth covered with bumps silicone particles, the silicone particles can effectively prevent sliding. SUPER HARD AND INCREASED THICKNESS:The support plate is made of 10mm medium density groove board, thick enough to support three adults' weight easily. Undermattress support is ideal for children's beds, bunk beds, sleeping sofa mattresses, pull-out beds, sofa beds or beds with support Flat noodles Zipper design and WASHABLE HOUSING: The support plate housing is designed with a zipper.In case of stains, You can open the zipper to remove the groove board. The housing is washed and dried in the washing machine.