As with all lines a lot of progress has been made with polymer compositions over the years in order to reduce the line diameter with increased breaking strength. Monofilament line is fairly cheap and has the ability to stretch significantly over a castable distance. The density of the line is normally close to or just slightly more than that of water, meaning that the line is either floating or slow sinking. As a last consideration the line is fairly UV resistant with very good abrasion resistant properties. Depending on the brand and diameter memory can sometimes be a factor to deal with.