Equivalent to 14 sandbags, JUST ADD WATER! Tube includes 14 DefenderBags plus 1 piece of FloodScreen (9ft. 10in.) which, when used in conjunction with our bags doubles your defensive efforts against damaging flood water. The DefenderBag cover lets water in easily, and internal super absorbent polymer (SAP) absorbs and holds water to inflate the individual bags from 10 ounces to over 40 pounds in a few minutes. Each DefenderBag (17.7″ x 21.7″) replaces 1 traditional sandbag.