The KONG Naturals Straw Balls Teaser are specifically designed to appeal to your cat’s natural hunting instincts. The unique straw weave has lots of nooks for easy snagging and its unpredictable roll adds to the fun. These toys are designed to appeal to the natural instincts of the indoor cat. KONG Naturals are ecologically responsible cat toys. The materials and dyes used come from natural, renewable resources.