The cat chew toys are filled with catnip, we chose a more breathable fabric so that your cat can easily smell the catnip, making your cat more interested in playing with them. The fine stitching of this cat toy makes it bite-resistant. No need to worry about it being chewed. Safe and high-quality materials: Stronger cotton linen; filled with soft PP cotton and natural catnip. Kill time with chew toys, help reduce boredom and separation anxiety for pets, catnip toys are great for cats to play indoors or outdoors.