Durable, high-quality construction: Made from strong PU leather with double-stitched seams and premium materials for a comfortable feel and long service life. Built to withstand regular use without premature wear. Inflatable, shock-resistant design: Features an internal air bubble and air nozzles so you can easily inflate the speed bag with a standard air pump. The air-filled core improves impact resistance and reduces leakage during intense workouts. Reliable hanging system and rebound: Supplied with a thick elastic rope for secure suspension. The rope resists damage and delivers consistent, responsive bounce to help improve timing, rhythm, and punching accuracy. Versatile double sandbag format: The double sandbag design suits a wide range of training goals and user levels. Easy to incorporate into boxing, conditioning, or coordination routines for fitness enthusiasts of all ages. Key attributes: Function: Speed bag for boxing training, cardio, and hand-eye coordination drills Material: PU leather with double stitching Inflation: Air bubble core with air nozzles; inflates with an air pump Suspension: Thick elastic rope for hanging and rebound Performance: Impact-resistant, leak-protected, consistent bounce and durability Use scenarios: 1) Boxing drills: Improve hand speed, punching timing, and shoulder endurance during focused boxing sessions. 2) Cardio and conditioning: Add to HIIT or circuit workouts for short, high-intensity intervals that build stamina and coordination. 3) Skill training and rehab: Use for hand-eye coordination, reflex work, or light-contact rehabilitation where controlled rebound and consistent impact resistance are important. Why choose this speed bag: Practical and durable materials reduce replacement frequency and provide a reliable training surface. Inflatable core maintains shape and impact protection while allowing easy pressure adjustment. Strong hanging rope and responsive bounce help you train more effectively and consistently. Includes: speed bag with air nozzles (inflates with an air pump) and elastic hanging rope. Suitable for home gyms, boxing studios, and general fitness use.