If you have kids, this is definitely something you need both for their beds and yours (who hasn’t had a kid crawl in with the ‘rents and then oops!).  Home Sweet Home Fabric Waterproof Bug Blocker Mattress Protector is only $24.99 with Free Shipping on GearXS.

• 100% polyester non-woven fabric with polyurethane lamination
• Smooth polyester top layer is soft and comfortable under sheets
• Defends against bed bugs, body fluids, skin flakes, bacteria, and dust mites
• 14″ pocket fits up to 16″ L mattress
• Machine washable
• Pest industry approved
• Available in sizes Twin, Full, Queen, or King