Sailors – only approved Class manufactured mainsail flags may be used on your mainsail. This is to ensure the same quality, consistency and weight of material for all boats. Any competitor using a non-approved Class mainsail flag will be asked to remove and replace with a Class approved. To order your mainsail flag for delivery in Poland for the Europeans, e-mail the 9er class office before June 10. Cost is 75€ per flag.