Although many of our beds feature water-resistant outer coverings, the only way to ensure 100% that your dog bed is protected is to utilize the Dog Armor waterproof liner. The Dog Armor Waterproof and Breathable Liner is a 100% waterproof liner that protects your bed’s foam from spills and leaks. While many of our beds feature water-resistant fabric, this liner ensures that no liquids will come in contact with the foam below. The Dog Armor Liner easily zips around the foam of the bed below the cover, with 360 degrees of protection. Breathability is important for our beds, that’s why this liner is both waterproof and breathable, so our temperature-neutral foam can keep your dog comfortable year round. The Dog Armor Waterproof and Breathable Liner is ONLY compatible with the following bed/s:Premier Memory Foam Crate Bed