Breath Mask Breath masks are portable filtering systems which cover the mouth and nose and provide life-sustaining gases for limited amounts of time; they provide no protection from cold or the vacuum of space. Most breath masks only work for one hour of continuous usage before the filters are spent. These pages are in no way endorsed or sponsored by Lucasfilm Ltd or West End Games. ®, TM & © Lucasfilm Ltd. (LFL). All rights reserved. Trademarks of LFL used by West End Games under authorization.