A Sandweight is a soft, durable and attractive neoprene disc with weight fillers. It's a perfect substitute for a dumbbell, kettlebell or medicine ball. The Sandweight is very versatile and due to it's flexablity and softness will not damage the floor.
Other weights are Available: 2kg/4kg/6kg and 8kg.
****** Thanks to bambamsmam for info which follows...there is a further offer when you get 2.. the 2nd is half price, so you can get a variety