PERK2 JUGGERNAUT

Increases your health, taking 75% of the damage from bullets and explosives that is to be originally dealt. If a soldier with Juggernaut is fired upon from a player using Stopping Power, the game calculates it as a perkless fight. Also if a person with Sonic Boom throws a grenade next to someone with Juggernaut, the person with Juggernaut will take regular explosive damage, instead of the increased explosive damage from the Sonic Boom user. This perk is great to use when you like to lay down some cover fire for your teammates. You can keep firing and take a few shots while your teammates get to where they need to go.
How to tell if someone has Juggernaut - When you fire at someone and you see a red cross, it means they are using the juggernaut perk.
Juggernaut is available by default.