Suitable for business people, designers, engineers, teachers, students etc. useful and environmental-friendly Smart Erasable Notebook can be reused up to 1,000 times in good keep A good helper for class notes, drafts, sketches and to solve mathematical problems. support wet erasing by wet tissue and rag. support hot erasing by hair dryer Smart Erasable Notebook match perfectly with colorful erasable pens like gel pen Light and easy to carry, waterproof and can be recycled. a good idea to erase every few weeks to keep your book in perfect condition