When you call a blitz, the defenders must blitz hard! Half-hearted blitzes will lead to you giving up big plays. You can live by the blitz, but you can also die by the blitz.
The the 4-4 defense is a balanced defense that features 4 defensive linemen (2-defensive tackles (T) and 2- defensive ends (E)). The back seven include four linebackers and three defensive backs (SS is a hybrid/monster type player).
You can play a variety of different coverages behind these blitz packages. These 4-4 defense blitz packages are drawn up with the defenders playing man to man behind the blitz. These blitzes play cover 1 or cover 0 ( no safety) behind the blitz.