Built-in burrowing pockets. For dogs— big or small— who like to sleep under blankets. If your pup prefers to sleep au naturel, then the pocket is a non-issue. Machine washable, inside and out. Zip off the cover and wash it alone. Or throw the whole thing into the washing machine (on gentle or delicate cycle!) and dry well on a low setting.  100% cotton prints. Small is a 30 inch diameter and Large is a 42 inch diameter. Choose from one of the following fabrics: