SPRI Xerball Medicine Ball Thick Walled Durable Construction with Textured Surface (Available in 2, 4, 6, 8, 10, 12, 15, 18, 20, 25, 30 Pounds) CLASSIC MED BALL: Body training tool that helps develop muscular strength, endurance, power, stability and joint integrity THICK WALLED: Thick walls increase durability and extend the life of the ball and the higher rubber content provides a better bounce - add air to increase the bounce and add variety to your workout TEXTURED BASKETBALL-LIKE SURFACE: Allows for a more comfortable and secure grip even during the most strenuous workouts BUILT FOR REPEATED USE: Medicine Ball will retain shape after repeated use and is built to a professional grade quality and designed for commercial gyms and clubs to be used 100 times a day versus 100 times a year in a home gym BOLD COLOR CODED: Easy to read weight stamps allow for quick identification of weight desired