Sleeper Sofa Mattress Encasement Size: Sofa Sleeper Queen Cotton Sleeper Sofa Mattress Encasement Size: Sofa Sleeper Queen Full low-profile: 54x72x5 inch 100% complete mattress protection on all sides 100% encasement Smooth membrane-lined cotton fabric all around 100% Waterproof on all sides 100% waterproof barrier Halt the spread of viral contaminants, bacteria and dust-mites