A lifeline is a piece of waste yarn inserted through a row of knitting. This waste yarn acts as a safety net allowing you to unravel your knitting back to this point without the fear of losing all of your work. When working a complicated design, insert a lifeline after a successful row and you can always return to this point should your knitting go awry later. This video demonstrates how to utilize a lifeline and three options for inserting them into your knitting. Take the fear out of your knitting!