Equivalent to 36 traditional sandbags, JUST ADD WATER! Each tube includes 12 BOOMBAGS plus 1 piece of FLOODSCREEN (9ft. 10in.). Our BoomBags are designed to stretch the length of a larger doorway with each section sized to match that of a standard sandbag. Simply add water and you’ve got a near-instant impenetrable barrier in minutes. FloodAvert products are easy to store and inflate quickly when they come into contact with water. Traditional sandbags are messy, difficult to store, and take time to prepare. Specialized cover lets water in easily, and internal super absorbent polymer (SAP) absorbs and holds water to inflate the bags.