The North Sails Max Power mainsail is designed for soft ice and light air. Whenever you need power, this is the sail for you. This sail is designed to give maximum power during acceleration and then to flatten out and provide just the power needed once top speed has been achieved. Recommended for: When there is a layer of snow on the ice; super light breeze (0-5 knots); or if you are on the heavier end of the weight range.