Made of 97% natural rubber foam without any fillers, Rubbabu balls are innately anti-microbial, hypo-allergenic and mildew-resistant Flocked in a soft, safe, velvety fine nylon in different colors and shapes, little ones won’t want to let go of these esthetically pleasing balls. That’s a good thing because they boost babies sense of touch and encourages kids to touch, grasp and hold the toy, developing their motor skills. These award winning 4" balls are suitable for all ages, but should not be used as a teething toy. Best for ages 3 months and older, they can be cleaned by wiping with a damp cloth. Sold individually.