Premium components: Solid 3. 5 inch memory foam base for superior overall comfort, improved health, mobility, & energy. Solid foam 2-bolster design for greater resting surface area. Durable & Comfortable 100% polyester micro suede fabric. Smart design: 100% waterproof memory foam liner protects your investment. Water resistant & tear resistant outer cover [nothing is chew proof! ]. Non-skid bottom. Replacement covers available separately. Easy to clean: removable cover is machine washable. Simple to spot clean & remove hair, two-compartment zipper design to make re-loading base & bolster easier.