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Sand sack is generally used in army to protect soldiers and military device.
But it is easily torn because it's made of vinyl band.
After all it can make a lot of useless trash in training process.
Our product is made from PVC which is thrown out. So it can reduce trash and use sustainably.
It can get over previous problems in sand sack such as weakness material, atypical shape.
Overall shape is block ; it can be easily assemble so it can reduce the time during making bunkers or structures. It also has a cap under the product to put soil into it easily and fast.
There is gun support holder so soldiers can easily use gun.
Sejong, South Korea
Seok Young Kim,
Jun Haeng Huh,