The Butterfly Smoke Seal Kit- uniquely blocks Deathly Smoke... A safety "must-have" for hotels, offices, dorm rooms, bedrooms, patient rooms - anywhere a fire can arise. INVENTED - By the manufacture that produces fire barriers for buildings, worldwide (Fireline520 Project Gallery web page - hospitals, stadiums, airports, etc) RECEIVED - numerous Awards, Testimonies and Endorsements by fire saftey-related professionals (see Endorsements page) UL APPROVED - with Patent Pending; "Made in the USA" product TAKES - less than 60 seconds to install (see How to Install) USED - for smoke safety mitigation as fire extinguishers are used for flames COSTS - less than the average fire extinguisher (Order online or call) MOUNTS - or stores by a door, or packed in a suitcase (soft travel version)