Western Sulphite® Side Seam Regular with Pres-Stik® -This popular white wove commercial envelope is manufactured with two side seams under construction, no window and a self-sealing latex adhesive.White Sulphite (SFI CERTIFIED) 92% BrightnessVellum FinishTwo Side Seams Under No Window Self-Sealing (Latex Adhesive)Flap Extended