Is the BURST Floss Vegan? October 04, 2021 22:42 Updated Yes, BURST uses Microcrystalline wax on the BURST Floss which is Vegan. Related articles Does the BURST Floss contain any PFA's? Is the BURST Floss biodegradable? Were any animals harmed in the making of the BURST Floss? Is the BURST Floss Compostable? Why does the BURST Floss expand and how?