4 Cal King or King Mattress Bags- Pillow Top and Box Spring Compatible. Ideal for Moving, Storage, and Protection From Bed Bugs! Proudly Made in America! Mattress Bag Cal King and King Mattress Bag. Designed to Protect Your Bed From Bed Bugs, Insects, Dust and Debris During a Move, Storage or Transport. Made from Recycled Plastics Made in America Compatible with all Pillow Tops and Box Springs Zero Waste Moving Solution