Outward Hound Invincible Tough Skinz are made with durable Invincible Squeakers that Keep Squeaking' If Punctured and feature exotic animal skin prints and patterns! Tough Skinz are as durable as they are adorable and sport a colorful top layer of strong material backed with our super strong Chew Shield. With strong stitched seams and tough construction, these durable plush toys are great for super chewers and players.