BakFlip G2 tonneau cover is made from high grade aluminum panels that are fused to an EPX (extruded polystyrene) core. Many features are packed into the BakFlip G2 including: fantastic security, easy operation from both sides of the truck, designed to handle any climate condition, provides 100% full unobstructed access to the entire truck bed. With the BakFlip G2 you will be enabled to haul large cargo, items and equipment by simply folding up the BakFlip G2; then whenever you need to store items securely and protected, you can simply fold down the BakFlip G2 and lock it into position. The BakFlip G2 tonneau cover acts double as a rear window protector when fully opened. The most important feature however that the BakFlip G2 brings to the table is the ability to increase the fuel economy of a truck by approximately 11%.