Our quality O'Day sails are available for the O'Day 15, O'Day Daysailor, O'Day Javelin, Mariner, Mini, Osprey, Tempest and Widgeon. Our sailmakers have more than 30 years experience in the design and construction of small boat sails. These O'Day sails are built of premium Challenge sailcloth and include a 30-Day money-back guarantee.