 Does your son or daughter have a hard time making contact with the ball when they swing? ZVT was created to help kids play better ball. All of you parents and coaches out there want to help your kids, and so do we. Check us out at zvt.com. ZVT is the ball player's advantage, the fastest-growing tee on the market, the game's most advanced hitting tee with patented LED fiber technology, a national brand developed and built right here in Salisbury, Maryland, by a dad that wanted the best for his kid.