Make sure after school activities or important meetings are all achieved with the Filofax Activity Planner Refill for the A5 size Filofax Refillable Notebook. No matter how complicated days get, the Activity Planner refill in Minimal style is designed to show all aspects of life at a glance - the perfect tool for work, study or busy families. Fountain pen-friendly, 80 gsm paper. Designed for the A5 Filofax Refillable Notebook. Over the years, the Filofax organizer has evolved from a simple loose-leaf system into an indispensable everyday accessory. The Filofax logo promises authenticity and the finest craftsmanship. It's a hallmark of impeccable quality, trusted worldwide, since 1921.