Help ensure shipments reach their destinations in mint condition with help from these poly mailers. Durable exterior and high-strength seams guard against moisture damage and splitting. Polyethylene exterior supports secure label and ink adhesion. Self-seal flap with a tear strip enables easy closing and opening. Puncture water tamper and tear resistant for defense against the elements unauthorized opening and the rigors of shipping. Strong seams help keep the envelope intact even when overloaded.