Tripwire EDC Notebook Cover
Made by California-based ARC-Co, this Cordura case holds an 8.5″ x 11″ notebook, along with your everyday carry items like pens, pencils, knives, and payment cards. Its front flap snaps securely in place to keep it shut. They also sell a smaller version for Field Notes and other 3.5″ x 5.5″ journals.