Velpine® (White Kraft) Open End Policy with Plasticleer®Window & Thumb Cut - Open End Policy envelopes have their opening on the short dimension. These envelopes are manufactured using durable white kraft paper, one side seam under construction and a thumb cut instead of a flap. Also known as a Pic-Win® Policy, these envelopes feature a large cellophane window.White Kraft 84% Brightness Vellum Finish One Side Seam Under Cellophane Window Thumb Cut