The EU Directive allows enriched or "furnished" cages to be used. Under the directive, enriched cages must be at least 45*cm high and must provide each hen with at least 750*cm² of space; 600*cm² of this must be "usable area" – the other 150*cm² is for a nest-box. The cage must also contain litter, perches and "claw-shortening devices". Some animal welfare organisations, such as Compassion in World Farming, have criticised this move, calling for enriched cages to be prohibited as they believe they provide no significant or worthwhile welfare benefits as compared with conventional battery cages. The use of battery cages is banned in Belgium, Austria, Sweden and the Netherlands.