No Longer Available:Custom Slip Covers
entsyscorp.com sells custom slip covers for the L1 Cylindrical Radiator® loudspeaker. "These white Slip covers are made from flame retardant spandex for the Bose L1 radiators. Price for 1 slip cover (appears to be $37.50). Select colors are available for $ 64.00 each." See website for details.
Here some photos I took at a recent gig.
L1® Model II against a light yellow background. Note the painting in the background is predominantly bluish white.
Here is the same L1® Model II with the custom slip cover.
From the other side.
And with the custom slip cover.
I had some concerns that the cover might not be long enough for the Model II as these were originally designed for the Classic. The Model II is slightly taller. I needn't have been concerned. There was plenty of material. I may have pulled it down a little too tight.