Recently we have been using the Rooster “no tangle” Laser mainsheet. it is a 6mm yellow and red fleck in colour and runs freely. While I believe it is virtually impossible for a Laser mainsheet to never tangle due to its length and movement inside the cockpit especially on a windy day, this mainsheet goes a long way to doing the impossible. I like the mainsheet especially for Laser 4.7 and Radials however I have seen a number of standard rig sailors using it as well. For me in anything over 18 knots I find this mainsheet too thin however the Youth sailors prefer it in any conditions. The Rosster mainsheet comes in two lengths and I would recommend going for the longer version as it allows you to move between rigs and also allows you to easily tie it off to the rear of the hiking strap which is what I prefer. Available from Rooster Sailing Australia.