3M Half Facepiece Reusable Respirator Drop Down 6300DD, Respiratory Protection, Large Drop-down design allows wear without removing the hardhat Head cradle adjusts to the individual workers head for a comfortable and secure fit Upper strap adjustment is on head cradle so strap ends do not interfere with workers vision Exhalation valve cover directs air downward to eliminate fogging of faceshield Replaceable cartridges and filters allow reuse for cost savings