Feather Friendly Bird Collision Deterrent Markers are crafted for lasting durability without the need for specialized upkeep! Feather Friendly is a uniquely formulated proprietary material of the highest quality. These markers not only deliver effective bird collision prevention but also boast a prolonged lifespan, requiring minimal maintenance! Visit our website to learn more! #birdfriendly #birdsafe #windowmarkers #glasscollision #featherfriendly #birdwatching