Our DN Iceboat sails are designed with an eye for speed. All extra windage and weight has been shed from headboard, batten boxes, and batten ends. For ease of use in cold weather, the three full-length battens are adjusted using RBS rocket adjusters. These adjusters allow the batten tension to be eased at the end of the day and then re-tensioned by the same amount the next day. The single leech batten is removable without requiring tools. Another advantage of North DN sails is a flex-cord luff rope, which allows the sail to slide easily through the mast track.