The Dirtbag Hybrid is one of our "new generation of footbags. Two layers of cover material, trapping sand between them, gives this hacky sack the weight of a regular Dirtbag, while the interior is filled with plastic pellets to give the footbag plenty of loft when you kick it. Complete washability is an added bonus to this slightly-oversized footbag. For those of us that do not love a sand-filled footbag, this one is a great compromise between sand -vs- plastic pellets.