Hi jjjlll, The bed is constructed to have removable washable cover. Care instructions are "Remove cover. Machine wash cover separately on gentle cycle in cold water and mild detergent. Use only non-chlorine bleach if needed. Tumble dry on low." Thanks,

The bottom is a foam egg crate piece.. polyurethane  the bolsters are filled with 100% polyester stuffing.  

This bolster bed is 40"Lx30"W with about 8"H bolsters. I use a "Molly Mutt Dog Bed Duvet" cover in size Huge (45"Lx36"Wx5"H) to completely encase my dogs' bolster/cuddler beds. The extra size of the duvet cover allows it to contour over this bed's bolstered shape, so the bed remains a soft, deep nest. I first slip this entire EveryYay Cuddler Bed into a size Huge, zippered, water-proofing polyester liner - also made by "Molly Mutt" - to prevent leaks getting through to the bed's bolsters & mattress. Then I slip the entire waterproof liner encased cuddler bed into their size Huge, 100% cotton canvas Dog Bed Duvet cover, & zip it closed. Be sure to use their heavy cotton duvet cover over top of the waterproofing liner, so your dog isn't sleeping on just the thinner, slippery, waterproofing liner. This "EveryYay Snooze Fest Orthopedic Cuddler Dog Bed" makes a super-comfortable, & long-lasting nest bed when encased in the easy to remove & wash duvet cover I just mentioned. "Molly Mutt Dog Bed Duvets" come in several patterns & colors, so I like the decor choice, as well.

There are washing instruction on the care label on the back of the bed. You can wash the cover with the filled bolsters, you don't need to take any stuffing out. Here is what the label says: "Remove cover. Machine wash cover separately on gentle cycle in cold water and mild detergent. Use only non-chlorine bleach if needed. Tumble dry on low."