The StackPack
 
The StackPack or Lazy bag is a cover that opens automatically to accept the main sail as it is lowered. The cover and lazy jack system neatly flakes and holds the sail as it is lowered or reefed. The folds at the foot of a reefed mainsail also lie neatly in cover, eliminating the need to tie off the excess fabric with ties. With the sail completely stowed, the cover system presents a neat appearance and automatically protects the sail from harmful UV rays. While sailing, the integral cover lies flat against the foot of the sail for a clean aerodynamic effect. Cruising sailors are often faced with the dilemma of whether to sacrifice sail shape and quality for convenience. The Lazy bag or StackPack is a solution for sailors wanting convenience without sacrificing speed and shape.

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