The Lazy Bag is designed to contain the mainsail. Custom Lazy Jacks attached to the top of the Lazy Bag support the canvas while the boom holds the bottom of the canvas. A continuous line, adjusted at the mast, is used to control the zipper along the top of the Sunbrella Canvas. The control line unzips the cover and zips the cover together. Reefing is not effected by the cover due to cutouts in the cover at clew reef rope locations. Tack reef area is accessed by simply opening the snaps at the mast. Choose your color choice of Sunbrella Canvas.