The GEL-RESOLUTION™ 9 GS (Grade School) shoe creates advanced stability for youth tennis players.​ A kid's-specific last is used that offers a more precise fit while comfortably accommodating growing feet.​ Forefoot GEL™ technology helps provide more impact absorption and good comfort on the court.​ The outsole's wider flex grooves make the shoe feel more natural when making quick transitions or shifting directions.