Heard the adage, thin like paper? We nailed it with our Tyvek mailers, also known as plastic mailer envelopes. The Tyvek material is manufactured from plastic fibres. It is very lite in weight, you could say, about half the weight of a Kraft paper. While they are defined by a paper-like feel and texture, yet their durability is unquestioned. These are so thin that they straight away cut down on weight costs and voluminous shipping woes. Like all its country cousins, these too have a peel-and-seal flap for ultimate ease of packing.