Bulletproof helmets level 4 don’t exist according to the National Institute of Justice levels. The highest level of protection that a ballistic helmet can provide is Level 3. Anything else is a scam, and you should seek out verified suppliers with reliable products that will actually stop bullets.

Bullet Proof Helmet Level 4 is typically used to protect against bullets or debris. The high-strength and high-modulus polyethylene fiber tactical helmet series uses thermoplastic resin as the base material of the bulletproof helmet. These helmets are lightweight, UV resistant and have a negligible impact on moisture.