Co-extruded multi-layer film construction for maximum tear and impact resistance. Smooth inner layer allows for quick, easy product insertion and provides complete opacity to assure security of contents. Outstanding water resistance protects contents from the elements. Improved tamper-resistant, self-seal closure saves labor and keeps contents secure. Smooth, silk-like surface enhances color printing for brilliant graphics, and the transparent side of the ShurTuff Preview mailer is perfect to display promotional items, annual reports or catalogs. Customer Satisfaction - Perforated strip facilitates easy opening.