1.MATERIAL : Made of paper material, non-toxic and no odor; It is writable and smooth writing, you can use it to write or marked. It is widely used in work and study. 2.ADHESIVE & REPOSITIONABLE & REMOVE CLEANLY: Excellent adhesives make our tabs can be used ,convenient to stick and mark,and can remove cleanly,won't leave residue on the page.Besides,you can write words on tabs with ballpoint pen without damage to books. 3.SOFT COLORFUL & PRACTICAL: colorful sticky page markers, use it to mark and highlight the important information, let you easy to find the key point. Can be index labels and colored are eye-catching for you easy to find; You can organize categories by color flexibly.Save your time, improve your work and study efficiency. 4.WIDELY USED IN STUDY & WORK: It can be perfectly used for reading notes, books, magazines, folders, organizers, diaries, catalogs, archives, files and papers marking and highlighting. It is quit suitable for students, teachers, office staffs and so on.Easy to Write with Pencil,Ballpoint pen or Gel pen.