Biltwell Gringo S Helmet Flat Shield (Red Gradient, One Size) UV Tested: Biltwell Gringo S Flat Shields are UV rated at UV +50 with over 92 percent UVA block and over 99 percent UVB block. Shields were evaluated for UV resistance as per test method AATCC 183 Universally fits all Biltwell Gringo S helmet sizes