Eco-friendly furniture includes those that are made from sustainable materials like bamboo, corrugated cardboard, recycled items and more. They attract the eyes of many environmentalists around the globe. Designer arno Mathies is just one of the eco-friendly designers that was inspired by the concept and created the Gruff, a series of eco-furniture made from laminated, corrugated cardboard, and was assembled using some housing joints. With the materials used for the furniture, the designer has considered his piece as disposable or permanent furniture for household and office use. I presume those furniture included in the gruff collection composed of a table, chair, and a display shelf.