The hush vivo pocket sprung rolled mattress features 1000 airsprung pocket springs encapsulated in a foam unit with soft white polyester fillings the border and sleep surface are made from soft knitted and quilted stretch fabric ensuring a cosy nights sleeponce the mattress has been manufactured it is vacuum packed and gently rolled into a cylinder it is recommended that the mattress be left to expand and settle for a few hours once the packaging has been openeddimensionssingle w 90cm