These are Velocity branded yellow lacrosse balls, which are suitable for training, tournament, and competitive gameplay.  Construction: Made with vulcanized molded rubber for durable performance.  Certification: SEI-certified and meets NOCSAE, NFHS, and NCAA standards for official play.  Technology: Features textured technology designed to delay greasing and maintain grip.  Make a bundle of at least 2 separate items fom my closet for a discount! *These items are new and unused. There is a little opening in the original plastic which allowed for a little debris to get into the plastic during storage (see pics). Otherwise, these are brand new lacrosse balls.