While human hands can’t typically squish Boz, dogs can compress the ball between their teeth giving them a satisfying endorphin release. Better then a tennis ball, Boz is more durable, squishy and doesn’t contain any toxic glues or lead. Size small fits in a standard ball thrower. Like all of our Zogoflex® and Zogoflex Air™ dog toys, Boz is recyclable, made in the USA, floatable, guaranteed against dog damage, BPA and phthalate-free, FDA compliant, non-toxic and dishwasher safe.