Ettore Porcupine Sleeve Only
Ettore's Porcupine Sleeve is a unique, heavy-duty design with thousands of interwoven bristles for tough jobs. The Porcupine is not intended for Mylar coated glass.
If you need a little more scrubbing power, this sleeve should help! Window cleaners have said that the porcupine really helps to get the gunk off of the glass.