Blackouts have a blackout level of 100%. These fabrics are completely impermeable to light. This is due to the soft acrylic coating on the back, which ensures that light rays cannot penetrate. This coating is particularly soft on DELIUS blackouts; the fabric retains its flowing drape. All DELIBLACK articles are free from decaBDE (decabromodiphenyl ether). A total of 10 different articles are available in a wide variety of fabric structures, some of which are also available in room-height versions.