The BOSU 2-Pack Balance Ball Trainer is a 6.5 inch cardio workout pod designed for home use. Made of durable rubber material, it features a rubber grip for stability and support during workouts. With a maximum user weight of 250 lb, this balance ball trainer is suitable for full body muscle groups and offers a variety of fitness options for gym and training activities. The blue color and compact size make it a versatile and effective tool for improving core strength and overall fitness levels.