Used during charging/storage of any hoverboard or scooter device powered by Li-ion battery, HoverCover™ prevents (when completely sealed and secured) spreading of fire by containing resulting flames and explosions after power source overheats and spontaneously combusts – known as thermal runaway. Construction is of Z-Block™ fire-resistant fabric, which passes U.S. and international testing standards: ASTM D6413, ASTM E-84, ASTM F955, FAR 25 Appendix F Part III and IV, and BSS 7239.