All our Fire Performance Equipment has KEVLAR wicks. If you look after the wick, it can last for years.
However, if you let the Fire Poi wick smolder by allowing all the fuel to be used up, the KEVLAR wick will burn slowly and fall apart, sunlight also degrades and darkens the color of the KEVLAR wick gradually over time, so it is good to have wick covers when using fire props during daylight, it also stops you from getting your daytime clothes dirty from the residues on the wicks.
Many people wrap some tin foil over the wicks and then put some colorful socks over the Fire Heads. We also sell some soft covers which can fit over some familiar KEVLAR Fire Toys.