Tucker has been producing the worlds best commercial window cleaning supplies since 1957! Nylon monofilament bristles are ideal for commercial window cleaning professional of all skill levels and experience. Nylon several unique properties that make it excellent for window and solar panel cleaning. When the filaments are vertical, the tips of the nylon filament excel and scrubbing away dirty and caked on grime away from glass. When horizontal to the cleaning surface, nylon has a superior glide that keeps the operator from experiencing premature fatigue and allowing them to continue cleaning for longer periods. Being a synthetic fiber, nylon is very resistant to breaking and has an extremely long life span.