Wallaces correctional centre mattresses – Flame retardant to Australian Standards (AS/NZS 3744.3:1998 or Australian Standard BS5852/Source 5.) It is Ultra-Fresh® antimicrobial treated to prevent microbe growth, reduce odour, improve hygiene and product longevity. With a comfortable, durable and fire resistant cover source 5, we supply fire retardant mattresses covers alongside a range of specialised sleep accessories uniquely developed for the prison environment.