All-weather paper Field-Flex cover Rulers, conversion charts, and map scales printed on the cover Built to protect critical notes and withstand tough training conditions. The heavy-duty &';&';perfect binding&';&'; holds strong through bad weather and years of abuse. Field-Flex covers easily conform to pockets or packs, yet spring back into shape - no worse for the wear. Rulers, conversion charts, and map scales printed on the cover prove handy in the field.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }