Yellow HEETS tobacco sticks are one of three flavours designed for use with IQOS and are the medium-strength of the selection. Simply insert a HEETS stick into the IQOS Holder and press and hold the button until the LED light starts to blink white. When the light glows solid white the tobacco stick has then heated to 350Â°C by the precisely controlled heating element within the IQOS Holder, and is ready to use. The device releases the tobacco flavour through a nicotine-containing vapour, without burning or generating smoke. Each HEETS tobacco stick can be enjoyed for around 6 minutes, or 14 puffs, which is similar to that of a regular cigarette.