Similar to the Series 3000, but having tapered side curtains and bottom pads in lieu of 18" vertical fabric covered foam bottom pads. The Series 3500 may be an alternate selection when space limitation or other considerations preclude the use of a rigid frame dock shelter. The shelter is normally in the extended position and utilizes spring tension to hold the curtains tight to the truck body upon vehicle entry. A split head curtain further adds to this unit's versatility in servicing a wide range of vehicles. A combination of our superior performance materials guarantees this unit will withstand the most demanding requirements.