Cleaning Dog Bed External Cover including Blue Denim Cover, Green Canvas Cover and Coffee Brown Suede Cover :

Unzip the cover, take it outside and shake out as much of the hair and dust as you can. If any hair remains, try a once-over with a lint roller. Please inspect the zipper puller surround area to see if any damage because many dog love to chews on those spot frequently.
Next, soak the cover in the sink or bucket in very hot water for 10-15 minutes before popping it in the washing machine to kill any insect eggs that could potentially be lurking. Wring the water out and then place the cover in the washing machine and set the water temperature to cold. Add a scoop of laundry detergent and turn the machine on at the normal wash setting.
Those external covers are dryer machine friendly. However we do not recommend drying on a high heat setting. Dryer may shrink the denim and canvas cover a little in size due to those fabric are 100% cotton made. We recommended to use the dryer with low heat or let it dry naturally in a sunny spot.

Cleaning brown color waterproof internal cover :

Due to those fabric are dirt resistant, it is easier just to wipe out any dirt or stains with a wet paper tower or cloth without soaking/cleaning the whole cover.
To clean the whole cover, unzip the cover and take it outside, then shake out as much of the hair and dust as you can. If any hair remains, try a once-over with a lint roller. Please inspect the zipper puller surround area to see if any damage because many dog love to chews on those spot frequently.
Next, hand wash it with laundry detergent and let it air dry naturally. Those covers are not recommended to clean it with washer or dryer machine.
Additional replacement covers are always available at dogbed4less.com.