Exceptionally strong envelopes combining good looks and strength. Heavyweight 130gsm manilla with a subtle two tone texture and Exceptionally strong and secure professional envelopes with a distinctive texture and finish on heavyweight 130gsm Manilla paper. Paper by Nature certified to help the environment. Peel & Seal closure featuring Power-Tac adhesive for an exceptionally secure seal. Includes Easy Open feature; a built-in tear strip which can be opened quickly and neatly without damaging contents.