Efficient ball : The elastic cord guides the ball back after each swing, reducing downtime and keeping practice focused. Arm swing technique: Ideal for beginners, it helps establish a proper arm swing and rhythm, enabling several drills in a row. Suitable for all sizes: Neoprene pouch with adjustable strap fits standard volleyballs and a wide range of waist sizes. Adjustable design: Elastic cord extends up to 5 m; waist strap fits up to 80 cm; quick to adjust for different players and drills. Durable construction: Neoprene pouch and strong cord are designed for frequent use and reliable performance. Use scenarios: Solo practice at home or gym: practice arm swing timing with continuous ball returns without chasing the ball. Small group or coach drills: rotate players and run backtoback swing drills with fast resets. Youth and mixedage clinics: adjustable sizing accommodates kids and adults for unified training sessions.