Sailpack is a sail cover used for mainsails and makes it easy for you to hoist, reef and store the sail. The Sailpack is also sometimes called a Lazypack, Stackpack or Lazybag. This Sail cover is made in a spacious design and is attached to the boom with zippers at the mast and on the side to protect the sail from rain and sun. The sailpack also comes with lines for the lazy jacks that are attached to strong straps. Along the boom, battens are fitted to maintain shape and stretch in this type of sail cover.