I had tried a 10X12 and 8X10 soft armor plates from other manufactures in my Tru-Spec Concealed Armor Shirt and even though Tru-Spec says the shirt will fit up to a 10X12 it is a very tight fit that prints badly. I found the Premier Ballistic insert that was advertised to fit the Tru-Spec shirt so I ordered one as a trial. It fits perfectly and is an extremely well made piece of Level III-A gear with the plus that it is stab resistant. I immediately ordered a second one to complete my shirt. I run security for our church so this will be a welcome addition to my kit. Great company to deal with, prompt shipping and offers Mil/LE discounts!