The BetterBone TOUGH dog chew is made to stand up to the most aggressive chewers. The Tough chew toy is still made with two all-natural ingredients and is still non-toxic, nylon-free, splinter resistant, and 100% sustainable.  BetterBone Tough is 70% denser and more durable compared to the BetterBone Classic. As a result, the Tough is best suited to dogs with strong, healthy teeth and those who just love to go to town with a nice rugged chew. The BetterBone TOUGH is roughly 5 to 10% harder than nylon and is perfect for your big chewer. Keeping your pup satiated, safe, and healthy while reducing environmental impact is the BetterBone promise.  -All-Natural food-grade ingredients Sustainably Sourced -Beef bones are flavored with real beef -Unflavored bones are hypoallergenic & vegan -Dental cleaning design -1 Order = 1 tree planted -1% for the planet member -Carbon-neutral company and product -Manufactured in the EU under the strictest EU standards -No phthalates, BPA, parabens etc.