Xpak bubble mailers provide outstanding low cost shipping protection for a wide variety of products. Xpaks are made from poly film with the cushioning of a Duroabubble lining. The poly film is gray on the inside for privacy protection. Xpaks provide excellent tear, weather and puncture resistance. Xpak also has the added security of a tamper evident seal (Hot-melt self-seal closure). An economic alterniative to shipping products in cartons.