The Discraft J-Star is the Youth version of the Ultra-Star ultimate disc. Whether you’re an Ultimate player or a youth ultimate player you wanna grab a star. This youth ultimate disc is official disc of the Ultimate Players Association. It weights the standard 145 grams and it is just like its big brother, the Ultra-Star, but with a smaller diameter and 30 grams lighter. The J-Star youth ultimate disc was designed for ultimate leagues with professional quality performance and consistency.