Mail your heart out with JAM Paper Heavy Duty Tyvek Open End Envelopes. Uniquely designed with a red, white, and blue striped airmail pattern surrounding the front and back sides, these envelopes will certainly impress recipients and leave a lasting impression! Store or send documents, brochures, magazines, and more with the assurance that they stay safe, as these envelopes are water and tear-resistant. This pack contains 25 white Tyvek® envelopes. Each envelope measures 10" x 13", has an open end opening (no clasp, gummed), straight flap, self adhesive strip closure, is made from 28 lb. paper, is 10% recycled, and has a smooth finish.Details:White airmail10" x 13"28 lb/75 gsmOpen end openingStraight flapSelf-adhesive strip closure25 envelopes10% recycled Tyvek