Elementary training ball -- making it easier for players to get into right position and hit nice shots.it can help players build the confidence and deepen their interest with tennis playing. material -- our tennis balls are made of high-quality polyester fiber and rubber and offer excellent wear resistance. beach tennis -- high-quality, pressure-free, and bright color tennis balls that can attract your sight when playing in parks and beach, at home, or on the lawn. floats for fun in the pool with your dog. wide applicability -- perfect for beach , good practice tool for beginner, intermediate and elite players. a fun gift -- got this as a gift for a tennis enthusiast and it's a great excises toy for creating great memories with your pets, children, friends and family.