24# White Wove Western Sulphite SFI Regular- No 9 ENVELOPESWestern Sulphite® Commercial Regular - This popular line of white wove commercial envelopes is manufactured with diagonal seams, no window and a traditional remoistening seal.White Sulphite (SFI CERTIFIED)92% Brightness Vellum Finish Diagonal Seams No WindowRemoistening Seal Flap Down