Ease to Use: The water barrier is ease to use, no sand needed. The flood defence barriers is light weight both dry and wet, this makes it labor-saving, anyone, no matter male, female or children, can manage it easilyNote:Please add 4.25 gal of water to fully activate.The flood barrier needs to be soaked in water to activate because it is absorbing water to expand; If not enough water is provided, it will not expand as expectedStrong Water Absorption: The water activated flood bag is highly absorbent and absorbs water quickly. It can grow to 10 cm (3 to 4 inches) in 5 minutes after absorbing water, this means the garage water barrier will be fully funcional very quickly. It's a very good sandbag alternatives for floodingWidely Applicable and Household Necessities: the water barriers for flooding are indispensable home essentials that can be used to absorb, divert and block water; They work well for doors, gutters, sewers, basements, garage entrances, driveways, fences, gardens, kitchens and so on, and can be reapplied multiple timesSufficient quantity: The product includes 5 pieces Absorbent Flood Barriers Home Sandless Sand Bags , about 5 ft x 6.5 inch, can expand to 3 to 4 inches/ 7.6 to 10.2 cm in height when filled, which avoids the heavy trouble of carrying and filling standard sandbags; These water absorbent barriers are good enough for daily waterproof barriers' usage