poly mailer 1)Durable,moisture resistant co-extruded polyethylene ... not contain any bubble, foam or paper cushioning. Our mailer is 100% recyclable. They are made from durable, ... ship clothes, bathing suits, shoes, books, magazines, etc. Plastic Mailing Envelopes come in a wide variety of thicknesses, colors ... more off-white or gray. The sizes for Poly Mailer Envelopes range from 5" x 7" all the ...