Engineered to meet the most demanding regulatory specifications worldwide. These bags are specifically designed for use in Biosafety Level 3 & 4 ( BSL 3 & 4 ) research labs for handling of very dangerous  aterials. These Biohazard bags meet all State & Federal requirements for hazardous waste handling. Including Federal DOT Regulation 49 CFR 173.197 for HazMat handling and markings. They exceed the ASTM D1922 Tear Resistance Test of 480 grams in both directions, As well as ASTM 1709 Impact Resistance of 165 grams