Record your thoughts and data while out in the field with this black Hard Cover Book with Fabrikoid Cover from Rite in the Rain. The durable fabrikoid cover is designed to be resistant to the elements and inclement weather conditions. This book has 7.25 x 4.375" sized blank pages to give you the freedom to write and sketch however you need to. The pages are sewn-in for durability and perforated so you can easily remove them if needed. There are pages with reference material including imperial and metric rulers, conversion tables, and map scales.