These Notebooks are made from acid-free (ECF) paper & no rainforests are damaged during procurement. An extra large note book specially made for CBSE & ICSE students. The strong & sturdy international style 3 pin binding with back pressing. Ensure pages are never getting loose, they are stay strong and last long. Good quality writing paper with Index page & an activity page (Puzzel for mind fresh). 100 year calendar & schedule provided on the inside cover pages. 3in1 rulings are convenient to use 3 rulings in one book. The Brown Note Book is a value addition, save time & money as they have a brown laminated cover, so students need not bother themselves with covering note books with additional brown paper.