Leafless in Seattle's exclusive MasterShield does 6 key things:
1) It's a microfilter that keeps debris out of your gutter
2) It has interlaced copper in the filter to actively prevent the growth of mildew and algae which could clog the pores
3) It's sloped like your roof so debris doesn't just pile up on top
4) It's got a patented HydrVortex Self Cleaning Technology
5) Guaranteed to prevent water damage from a clogged gutter
6) Guaranteed to prevent your gutter from ever clogging again, for life
7) Bonus point: 0% chance of finding a better, more comprehensive solution to clogged gutters ANYWHERE