K9 Ballistics Round Tough Orthopedic Memory Foam Dog Bed - Ripstop Ballistic Fabric CHEW PROOF RATING: 4/5; this bed is intended for LIGHT or MODERATE chewers and will resist 90% of chewing dogs. For a heavy chewer or very destructive dog, please consider our Ballistic Chew Proof Cot Super durable Ripstop Ballistic Material cover resists chewing, scratching, water, hair, dirt, and odors, and can be easily wiped down or machine-washed 5 inch thick orthopedic mattress consists of premium USA-made CertiPUR-US smart foam for optimal comfort Guaranteed against flattening for 10 years (does not apply to chewing/scratching damage) Covered by our 90-Day Chew Proof Warranty; if your dog damages the bed within the first 90 days, we'll replace the cover once free of charge