Kayaks, ladders, strollers, bags of chicken feed. If it's bulky, the SlingSets are up to the task. Slings can be buckled to the V-racks (V-rack buckles included) or can be buckled to the opposite side bag's straps over the top of the FlightDeck. If using with the Hi-Viz lid, the lid would go on the inside of the sling, not the outside. Sold in pairs.