Does Purple™ Mattress Protector protect against bed bugs? The Purple™ Mattress Protector is five-sided, meaning it leaves the bottom of the mattress exposed. To protect against bed bugs, we suggest a six-sided mattress protector! Related articles How do I wash the Purple™ Mattress Protector? What kind of mattress protector do I need? Do you need to flip the Purple® Mattress? How can I clean the zip cover that protects the Purple® Mattress? Does the Purple® Mattress protect from liquid?