Safavieh Dream Collection Serenity White and Grey Spring Mattress, 11.5-Inch (Twin) The 480 independently encased heavy-gauge metal springs provide maximum support and motion separation for comfort and sound sleep This mattress unfolds from a box as if by magic This is a twin sized mattress Features a 5 year manufacturer warranty For over 100 years, Safavieh has been crafting products of the highest quality and unmatched style