Built for the puppy or the avid chewer, our ToughChew® Dog's Nest® is doubly tough. The dog bed cover and inner liner are both constructed of tough 1,000-denier Cordura® nylon. The chew resistant dog bed cover also features a DWR finish that repels water and other liquids. Through your stories and our own experience, we've found this tough combination to be chew resistant, even with the most persistent of chewers. And it's just as comfortable a dog bed as the Cotton Canvas Dog's Nest. ToughChew Dog's Nests are filled with easy-cleanup spun polyester filljust in case. So go ahead and test this tough dog bed. If you've got one of those rare dogs who can chew through it, we'll refund your money. No questions asked. Washable. USA.