Woodinavia notepads are made of stone paper. It is waterproof basically forever, oil & greaseproof and tear resistant.
Tree-free stone paper is a great eco-friendly alternative to traditional paper. It is mainly made of mineral Calcium Carbonate, CaCO3, mixed with a small percentage of non-toxic HDPE.
Woodinavia notepad spiral binding is superior in comparison to the wire-o binding, which means no falling pages. 0.8 mm thick covers work as a rigid writing surface on the field.
Paper is 144gsm, squared 7 x 7mm. The stone paper has a smooth touch.
Notepad covers are made of durable plastic.