Usk is a Category C closed prison for adult male vulnerable prisoners (mainly sex offenders, convicted police officers, ranking civil workers which are convicted to serve a term or sentence). Accommodation at the prison consists of three main wings, which radiate off a central rotunda. The majority of the cells are bunked double-occupancy, all with integral sanitation. Good quality and well-screened showers are available on all residential units. Additional accommodation is located on Comber Unit (a 20-bed ground floor wing opened in May 2003). Allocation to Comber Unit is by application after 6 months as an Enhanced Prisoner. All prisoners have access to in cell TV with 9 digital Freeview channels, and access to limited disabled facilities. There is wheelchair access to most ground floor areas such as the Refectory and Chapel.