KOO interior panels were designed by Finnish architect Mr. Kari Lappalainen. KOO can be used in spaces that need long-lasting design elements. The beautiful wood gives a 21 mm thickness of the KOO-panels. Three different designs of the KOO panels can also be used together. You can choose between a calming grey tone or the appeal of real birch. The wax is water-based and safe to use.