
Masks for Mask-Helmet-Combinations [ Unique Adaption : Adjusts like your mask ! ] Fire services are increasingly using maskhelmet-combinations [ MHC ] , which allow full face masks to be fitted with adapters directly to the firefighter 's helmet . MSA , the only mask and helmet manufacturer , offers an innovative and safe solution : An unique concept using adjustable adapters without springs . Not only do the adjustable rubber straps allow for a more comfortable fit for every head size and shape ; better positioning also provides more safety . The adapter lets the user adjust the mask just as you did with your full head harness .