Western Sulphite® (White Wove) Open End Catalog with First Class Border Open End Catalogs have their flap on the short dimension. These envelopes are manufactured using SFI Certified white wove paper made with center seam construction, a preprinted first class border - with "First Class Mail" on the face - and a traditional remoistening seal.White Wove (SFI CERTIFIED) 92% Brightness Vellum Finish Green Diamond Border “First Class Mail” on Face Center Seam No Window Remoistening Seal Flap Down