A generally impermeable mattress cover having expandable sidewalls is provided to enclose a mattress to provide protection against allergens, dust mites, fluids, and other spills and spoils. The cover comprises generally impermeable top and bottom walls, and sidewalls connected at edges between the top...http://www.google.es/patents/US6971130?utm_source=gb-gplus-sharePatente US6971130 - Mattress cover with expandable sidewalls
