A vegetation trimmer with a filament enclosure has cutting filament stored inside the filament enclosure. The free end of the cutting filament extends through a portal in the filament enclosure into the cutting plane. The filament enclosure is rotated at a high rate to allow the cutting filament to cut vegetation. Additional portals in the filament enclosure provide air circulation to the cutting filament stored inside the filament enclosure to prevent heating of the cutting filament during use.
