A lot of people are new to the hemp wick scene so here is a link to a great article about hemp wick  from our friends at The Weed Street Journal:

“A Hemp wick has a tremendous amount of advantages over butane lighters, and for any avid marijuana smoker it would be the best option to light your bowls. The wick is made from hemp fibers and can be easily lit. Once lit you will begin to see the advantages of using a hemp wick immediately. First off, it gets rid of the risk of breathing in any butane or noxious gases from your lighter when you are lighting your bowl. Secondly, you have more control of the flame and can corner your bowl with a lot more precision. Since hemp is not a gas it does not combust at the high temperatures that butane burns at. This means when you are burning your bud it will be less harsh and you can take more intense hits of your bong or bowl without feeling as much strain on your lungs. If you are still using a lighter to light your bowls, then you have to give the wick a try. You will see an immediate improvement in your smoking experience.”

http://www.theweedstreetjournal.com/advantages-hemp-wick-butane-lighter/

Some people also refer to hemp wick as “hemp rope”, “hemp lighter” or “hemp string”.