text: I have level 4 ceramic poly plates. Safe Life has 2 10x12 level 4 plates for $338.00 for two plates. They are lighter than the level 3 steel plates and also have spall protection and trauma pads. They do recomend wearing the level 3a soft plates behind them. I have watched several test vids on these plates and they have been stopping steel cored 30-06 and 7.62x54 steel core ammo at 10yds. They also have a life time quarantee that if you get shot send the plate and police report and they will be replaced free of charge.