The STORM-BAG is a storm jib designed for use on sailing vessels equipped with a roller reefing genoa. There is no need to remove the genoa. It consists of a double-skinned sail that folds around the furled genoa, the two separted clews joining together to form one. It has been developed for yachts with no inner forestay and avoids the expense and trouble of installing a removable baby-stay as well as offering a fast, safe and effective means of setting a storm jib with minimal fuss for all sailing vessels. The STORM-BAG is comprehensive, durable and compact - it consists of the bag, the sail, the sheets (complete with snap-shackel) and a tack strop. The STORM-BAG comes ready to deploy. It can be used as often as necessary. When it is deployed its bag remains attached to the sail by its stitching - it stays inside the two plys. If the weather conditions demand it, it can quickly be dropped on to the deck with all sheets and halyards attached. Once the storm has passed, the sail can be easily repacked in the bag, ensuring a fast and safe deployment next time round.