Catnip is a member of the mint family of herbs. The chemical in catnip, nepetalactone, is what cats react to. About 80 percent of adult cats react to this intoxicating herb. These toys are perfect for anyone who loves cats. The makers of Yeowww Catnip work closely with private farmers to grow, manage and harvest the best organically grown catnip in the world. No chemicals or pesticides are used in the cultivation which means it is perfectly safe for humans and cats. Each and every toy is completely filled with this fabulous catnip, no cotton fillers, no plastic pieces and certainly none of that cheaper toy grade stuff. All Yeowww Catnip toys are handmade in the USA. The fabric is high quality cotton twill strong enough to withstand as much scratching, biting, bunny kicking and slobber a cat can dish out.l Each toy is individually stuffed and hand sewn so people know they are getting a toy with a touch of personality as well as being carefully handcrafted.