A raincoat is a waterproof or water-resistant suit worn to protect the body from rain. In most fashion markets including America, France, and Asia, a raincoat refers to both the top and bottom including trousers. The term rain jacket is sometimes used to refer to raincoats that are waist length. A rain jacket may be combined with a pair of rain pants to make rain clothing. Rain clothing may also be in one piece, like a boilersuit. Modern raincoats are often constructed from waterproof fabrics that are breathable, such as Gore-Tex or Tyvek and coated nylons. These fabrics allow water vapour to pass through, allowing the garment to 'breathe' so that the sweat of the wearer can escape. The amount of pouring rain a raincoat can handle is sometimes measured in the unit millimetres, water gauge. For the production of raincoats, the common raincoat sewing technology on the market is to use overlock, which is less comfortable to wear and cannot completely prevent the infiltration of rainwater. Therefore, computer high-pressure PU heat-sealing treatment technology can be used to widen the heat-sealing belt, which can effectively prevent rainwater from infiltrating from the pinhole seam and enhance the rain-shielding effect of the raincoat.http://www.yfdisposable.com/face-masks/dust-mask/