MyachiŪ hand sack is derived from the BicŪ lighter hand toss game. Much like "footbag for the hands" you use the back of your hands to toss the MyachiŪ back and forth and do tricks. The MyachiŪ is 4 inches long, filled with sand and comes in a variety of cool colors. See also our: Myachi DVD Combo Kit - for an instructional DVD and Myachi hand sack. ** Color Combinations Will Vary **