Hygea Natural | Vinyl | Bed Bug Box Spring Cover, Mattress Cover - Size XL Twin for California King 6 gauge vinyl mattress protector offers the highest protection for your box spring and/or mattress Three sided zippered waterproof mattress protector, protects against leaks and spills, blood stains, urine, sweat, liquids Bed bug box spring encasement protects against bed bugs, dust mites, bird mites, allergens, and fleas Manufactured and used by a professional extermination company as a bed bug proof box spring cover following an infestation Hygea Natural is a manufacturer and global distributor of bed bug products and natural pest solutions