Don't know much about this product. But see below brand description and images. Thanks.
- Freely adjustable waist, shoulder strap size to provide you with maximum comfort
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3 sizes of steel plates can be placed, which can be quickly
disassembled in an emergency, suitable for various scenarios and
physical training
- Made of polyester, good elastic ,waterproof and more sturdy
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The waist side is to reduce the weight of the vest, and is equipped
with elastic elastic bands to ensure the stability and comfort of the
vest when you are strenuously exercising
- It comes with padded mesh interior lining to provide comfort for your back