As for letting you buy foreign brands, they are all made in China. Because of OEM, there is a "brand".
Body armor is generally made of aramid fiber and ultra-high molecular weight polyethylene, namely aramid fiber and UHMWPE.
Kevlar is a registered brand of DuPont, which is actually aramid fiber.
Body armor is also divided into sub-standard and American standard. The Ministry standard is the standard of the Ministry of Public Security of China, which is generally two levels to prevent 54 and 79 micro-shocks.
The American standard points are relatively fine, from NIJ I to NIJ IIIA, IIIA is the highest protection level of bulletproof vests without hard insertion. Class IIIA is subdivided into two levels, one is 9mm pistol, and the highest level is 0.44 Magnus pistol.
Plus the plug board can reach the highest Nijiiv level, which can prevent the 7.62 x 63mm armor-piercing bullet of m 1 Garland rifle. The materials of Class IV board are generally aramid/alumina ceramics, aramid/silicon carbide ceramics, aramid/boron carbide ceramics, and UHMWPE and the combination of these three ceramics.
At present, many state-owned enterprises and private enterprises in China are producing bulletproof vests. The production technology of body armor is the same, and there is no high-tech content, so there is basically no difference between good and bad quality.
Standard protective body armor (front and rear protection), the protection area is generally 0.3 square meters (L size) 9mm and the price difference is not big, the price is about 600-750 (UHMWPE material), aramid fiber 100.