Infiltration suit isn't fool proof, but it is fairly affective. Great for taking out snipers and for sneaking into towers and bases, but watch out for blacklight implants and the vanu seem to be able to see you without implant. Not sure if their weapons have thermal capabilities or not or if they are just lucky alot. When you move you can be seen just like in the movie predator, if you stand still you go completely invisible as long as they dont have the implant. If you get infiltration suit when you hit BR6 you may want melee implant 2-3 swipes with your knife and they are dead.