Clean your living space with this white sage dragon's blood fragrance and enjoy a long burn time. These jumbo backflow cones are specially made for your backflow burner. This way you can keep your own smudging ritual and enjoy the beautiful backflow effect. The scents of dragon blood and white sage work together activating and cleansing. These Green Tree cones are stylishly packaged. p class="p2"> h3 class="p1"> class="s1">How do backflow cones work? These jumbo backflow cones are designed for the backflow incense burner. The jumbo size allows you to enjoy the fragrance for a long time. Backflow cones differ only slightly from the "regular" incense cones. There is a tunnel in the middle of a backflow cone. In this narrow opening, the air remains relatively cool after lighting the incense. Since cool air always falls, the smoke will flow down during combustion.