The BAKFlip F1 tonneau cover has two main positions: Folded upright, giving you total access to your truck bed with rear window protection, and folded down, leaving you with a truck bed cover that locks into place to protect your cargo from both the weather and sticky-fingered bandits. But perhaps the most stand-out quality of the BAKFlip F1 truck bed cover is its ability to not just withstand, but excel in extreme work and weather conditions. You can leave the denting, cracking, warping, fading, rusting and corrosion to lesser tonneau covers, because this thing boasts a polymer top, leak-proof rubber seals and EPDM rubber hinges that are made to outlast your truck. They certainly won’t let you down the next time you need to haul cargo during a sudden downpour. The BAK team knows how to make quality products, and the BAKFlip F1 keeps up with its namesake with high-tech, bulletproof construction and a long list of design features. They started with a super-rigid EPS core and then sandwiched it between - or, rather, laminated it with - a fiberglass-reinforced polymer on top and an epoxy-coated aluminum on bottom. Ok, so it may not be "bulletproof." But, no would-be thieves are getting through that deck any time soon. When you add in the fact that the top of the cover can handle a load rating of 400 lbs, it makes the BAKFlip F1 35% stronger than its younger cousin, the BAK G2 - and puts it lightyears ahead of other truck bed covers on the market.