D-ball has had quite the evolution from a ball that broke like crazy to where it is now:
1) The wall thickness has been increased by 2X to keep it from splitting
2) The plug design is an all new variant to keep them from getting damaged
D-ball will replace the med ball for free if it breaks on a one time basis. We have had only one breaking issue over the past 6 months so that tells me they are holding up very well. Making a med ball that can be slammed is not easy but d-ball works very hard to make that happen.
Other items shipping for free:
1) Equipment Packages – The only place in the world that consolidates your equipment package and ships from one location