Performance 1, US Department Of Defense (D.O.D) NIJ IIIA ECH Ballisitc Trauma Testing--6 Shots Fired, With None Backface Deformation More Than 11mm. 2, NIJ IIIA 0106.01 V0 Penetration Testing--.357 SIG & .44 Magnum Tested With No Penetration. 3, NIJ IIIA 9mm & .44 magnum Impact Attenuation Compliant 4, MIL-STD-662F V50 Ballistic Limit Test Result at 2452 ft/s (747m/s) 5, CO/PD-05-04 Sections 3.12.11 & 3.12.12 Compression Testing--Fully Comply And Matches Ops Core's Quality. Top-Bottom = .020 (0.51 mm) Max @ 400 lbs. (181.44 kg), Side-Side = .125 (3.18 mm) Max @ 300 lbs. (136.08 kg) per MICH Type II FQ/PD 06-35C: 2013 Material: Aramid Core Helmet Shell Suspension system: Nylon webbing & buckles Size available: S/M, M/L, L/XL, XL/XXL Weight: S/M 1.4kg, M/L 1.45kg, L/XL 1.5kg, XL/XXL, 1.58kg XL USD228