1, I-shaped double-stranded vest adopts higher quality materials, such as high-quality elastic fiber materials or special fabric technology. This material is more durable, breathable and comfortable, and has better tensile properties and the ability to keep shape.

2. Design and function: I-shaped double-stranded vest has more elaborate design and function, such as adding ergonomic design to provide better support and shaping effect, and adopting different structures and stitches in key parts to provide better support and shaping effect, making the body look more symmetrical and compact.

3. Manufacturing technology: I-shaped double rib vest has undergone more complicated manufacturing technology, such as fine sewing and smooth edge treatment, which ensures the quality and comfort of the product. The manufacturing process needs more manpower and time cost, which leads to the increase of product prices.