Traditional sandbag is about 50 kgs, Rainbow crystal clay expanded bag is only 430 g easy storage. Saving time, strength, and money; After about 3-5 minutes saturated in the water to be about 20 kgs of sandbag which is also reusable. Non-poison, inodorous and non-pollute approved by SGS inspection Small-size, easy-move and always ready to use with duration 3-5 years long. High polymer with super strong absorbent, environmental protective, easy, safe, none-pollute small size, light, ease-move, ease-piled up, ease-storage less damage, is always ready to use