We use these Composition books as Lab Notebooks. They provide a permanent record of daily Laboratory activity. A Lab notebook is referred to often and must be tough. They are kept for many years and must stand up to daily usage and occasionally a little rough handling. Staples Composition books are well made and stand up to heavy usage. We have been using them for years now and they continue to perform. We have tried others over the years but the Staples product is reliable and we keep coming back to them.