This is brand new never opened. You would fill this with old clothes, towels, weighted blankets - whatever you could find. Or you can buy the filling. 
VEVOR 42.5in Football Tackling Dummy PVC Step Over Dummy Blocking Pad Equipment
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BALAPET High Density Foam Football Tackling Dummy, Heavy Duty Tackling Dummie...
High Density Foam Football Tackling Dummy, Heavy Duty Tackling Dummies for Footb
