The SPRIĀ® Slam Balls are durable, sand-gilled no-bounce balls that are ideal for tossing and slamming activities. Made from a heavy-duty rubber shell for maximum stability, these slam balls are perfect for total body exercise, core strengthening workouts, and explosive power movements. They are a uniquely durable, evenly weighted, medicine ball that you can bounce and slam on any surface surfaces and still get a consistent rebound response. Sold in weights ranging from 15 to 30 pounds. Available