Zippered closure. Includes built-in solar calculator. Multiple file pockets and mesh pocket for documents. Removable 3″ x 5″ pocket jotter. Removable 1″ three-ring binder. Includes 8.5″ x 11″ writing pad. Refilla available at leedsworldrefill. Refill item number 9091-01 8.5″ x 11.5″ White, Wide Rule Perforated Writing pad & 9891-11 3″ x 5″ White, Unlined,perforated Writing Pad. Pen is not included.