These innovative flood control bags use 7S*3 ultra-high-density waterproof canvas with patented quick-stack connection system and zipper closure, offering 99.8% leak-proof rate and 28kg load capacity per bag. The green warning color design with unique snap-lock mechanism allows bags to interlock tightly, enhancing overall flood wall strength. Three sizes 35×65cm to 50×80cm meet various emergency needs, particularly suitable for urban waterlogging prevention, critical facility protection, and rapid flood wall construction.