Similarly to the 68 mm system, this is the best choice for those who highly value the purity of natural materials.

The key difference is the aluminium covering, which gives solid protection, just the like the bark of a tree. The windows are made from carefully selected and laminated pine, mahogany (Meranti), and oak wood. They are manufactured with technological processes which meet very demanding European Union standards, guaranteeing a product of impeccable quality.