ActiveGuard Mattress Liners are EPA-registered mattress and box spring coverings that kill bed bugs within 72 hours of contact and continuously beyond the bed bug's life cycle, the company says. Fashioned as a fitted sheet, the liners are available through online retail distributors and via the company website. According to Allergy Technologies, the breathable, comfortable thin liners can be installed onto a mattress or box spring by one person in less than a minute and require no airborne sprays or powders. The company says the liners also have been lab and field tested on a variety of bed bug strains.