Not all level III and III+ are made or perform the same way.  Better plates are made of higher grade, thinner, lighter and better ballistic performance ceramic composites. Not only they will stop the penetration, but they also provide a better blunt trauma resistance which is super crucial when comes to preventing internal injuries such bleeding and shattered bones.  Just because a plate can stop the bullets doesn't mean it will prevent severe injuries.   So before you buy a plate, make sure to check out these factors first.  A plate can last for years with proper care and usage, so treat it as a long term investment.
 
Newer design, approx 0.2" thinner than the last generation.  
Stand Alone Level III panel, not ICW (in conjunction with), which means you don't need to wear a IIIA vest behind it to achieve the NIJIII protection level.
NIJ III 0101.06 standard, protects you from M193 5.56, AK 7.62x39, and AK7.62x51(308)
65% lighter than the same size AR500 steel plates
Made of 100% UHMWPE and grey poly spray coating
Waterproof and floatable
Multi hit capable, advanced construction technique allows the panel to maintain its integrity after being shot multiple times.
Dual curve advanced shooters cut for a better fit when shouldering the weapon
Size: M is 10 inch x 12 inch x 1 inch, XL is approx 11 inch x 14 inch x 1.02 inch
Weight: M approx 3lb,  XL approx 3lb 11oz
6 year warranty