WFA Sand Master Footbag 779914. Specifications for WFA Sand Master Hacky Sack : Manufacturer: WFA Condition: New Features of WFA Footbag - Sand Master: Sand-filled 14 panel footbag Ideal for all freestyle delay tricks Slightly heavier and softer to slow down the action Color combinations vary Package Contents: WFA Sand Master Hacky Sack 779914 WFA 779914: Sand Master Footbag