It keeps you from having to sweep-off the top of the slide when you retract it. Without the awning, or sweeping, you will get leaves, twigs, bird-doo, etc into the top seal, and inside the unit.
Be Safe, and Everyone Goes a Home,
2014 RAM Laramie 2500 w/6.7L Cummins Diesel and Automated Safety Hitch
2016 377RLBH Jayco North Point
300W of Suntech Solar w/Rogue MPPT Controller & Xantrex 2000W PSW Inverter