The Dräger Chemical Set X-plore 3300 set comes ready to use and is high quality, low maintenance, inexpensive and comfortable. Includes a medium-sized Dräger X-plore 3300 Mask and a pair of unattached ABEK1HgP3 bayonet twin filters (replaceable). The bayonet filters are combination filters which means they have two layers. One layer protects against gaseous fumes and vapours (class 1) and the other layer protects against dust and particulates (class 3). Class 3 particle filters are 99.95% efficient in protecting against dust and particulates.