75mu which is 300 gauge

Ideal for mail order, courier services and in particular the legal profession where confidentiality is important.  These bags are also ideally suited for those heavier items, or items or packaging which has sharp edges as the film is a lot thicker at 75mu.  If you need mailing bags which are 100% opaque ands extra tuff and durable, then you need these

Made from a three layer film, rather than the standard mono layer film used for standard mailing bags, these are really tuff envelopes.  With a unique grade of hot melt glue used for sealing the bags, once they are sealed, they are sealed!!  Bags can be addressed and accept labels, stamps and biro

Picture shows black inner on bags but stock are a mid grey.  Bags are still completely NON see through!!