The ASICS NETBURNER BALLISTIC FF 4 indoor shoe is designed to help increase speed and flexibility for multi-directional movements. SPEEDTRUSS is designed for quick accelerations and cutting motions, which allow you to move faster. The PRECISION SOLE design uses a 3D modeling application to generate the new outsole pattern, achieving best balance of flexibility, lightweight, and grip; combined with the X-GUIDANCE technology in the flex grooves to provide extra flexibility during multi-directional movements. Lastly, the FLYTEFOAM midsole helps provide improved comfort and faster movements. No-sew film covered mesh offers an improved lightweight fit, loop lacing system helps create an advanced fit, and lean back heel structure offers a comfortable ankle fit. Polyester upper. Polyester lining and insole. Round toe shape. Signature side stripe detail. Synthetic rubber outsole.