Much of the building will be constructed in solid wood (CLT) harvested from sustainably managed forests. CO2 is stored in that material for a longer period of time, so that it contributes to the reduction of the amount of greenhouse gases in the atmosphere. CO2 emissions are also prevented because less steel and concrete is used than in conventional buildings. The building will be largely prefabricated and assembled on site in a relatively short period of time. Although not visible in every place, the wood gives a tactile quality to the interior. The material is especially visible in the substructure, where floors, columns and the roof construction are made of wood. The wooden ceilings are clearly visible in the towers. Not all parts of the building can be made of wood or other biobased materials. The most heavily loaded structural parts (including lift cores) of the building are made of concrete. To reduce sound transmission, the top of the floors in the living area is also made of concrete. The south and west facades are fitted with solar panels in a color scheme that matches the rest of the facade. The three lower floors of The Dutch Mountains are all about meeting. This part of the building therefore includes catering, sports facilities, shops, meeting rooms, exhibition space and a large conference room. These functions are connected by the publicly accessible spacious entrance hall. The lowest layers of the towers above the plinth will be furnished as offices and workplaces. These open work floors are adjacent to terraces that have a view of the collective interior space where there is always something to do.