These notebooks feature extra-opaque, heavyweight paper with optimal writing smoothness. All books feature printed colored lines and the multi-subject notebooks have colored margins. These books quickly become a favorite for all who try them. Unique design helps organize your work, books contains 30 of each color maroon, blue, charcoal and turquoise color page edges and lines to mark and separate each subject. The extra-opaque heavyweight lined paper resists ink bleed. Sheets are micro-perforated.