In single or man to man coverage, the cornerback is responsible for a particular receiver assigned to him. As the play begins, the corner may either attempt to "jam" the receiver at the line, play a step or two off of him, or concede a few yards and play with a "cushion". Cushions can range from a yard or two, to forty yards in a "prevent defense" situation. Cushion is just how far off the defender plays away from the offensive player he is assigned to defend. When lining up in front of the receiver to "jam" him or playing just a few steps off, it is important that the corner keeps his body in front of the receiver's body. The easiest way for a corner to be in position is to line up slightly inside of the receiver and the ball, and keep his eyes looking between the receiver's hip and his knees. If a cornerback loses focus on his receiver, the receiver will run straight past him, and then it leads to corners having to use the cushion technique. Generally, cushions are smaller in single coverage and larger in zone coverage.