Test measures the ability of the material to withstand impact from water. Test method measures weight of water (g) that penetrates material during test. Impact Penetration Test results of <1.0 g of water in combination with a Hydrostatic Pressure Rating of > 200 mm and <500 mm classes fabric as AAMI PB 70 Level 2 Barrier. Test results of > 1.0g and < 4.5g water that penetrates the material classes fabric as AAMI PB 70 Level 1.