The 4–4 defense is based on speed, athleticism and intelligence rather than on size and strength. Versatility is key because every player may have to change roles from one play to the next. It is an attacking defense stocked with multiple blitz packages that can easily be concealed and altered. The top priority of the 4–4 defense is stopping the run by keeping eight men close to the line of scrimmage. This also makes it difficult for the offense to identify where the pressure comes from when the defense blitzes. One other significant advantage of the 4–4 defense is its flexibility and adaptability. The 4–4 can shift into nickel or dime coverage quickly and easily.