This mast float significantly reduces the risk of inversion. A very neat design of 2 inflatable tubes connected with a piece of sailcloth. The sailcloth can be folded around the rope inside the sailtrack. The mastfloat is hoisted with the sail. Each tube has a length of 80 cm and can contain 4 liter air, so total buoyancy is 8 liter. Please note this product is meant for small dinghies only and does not guarantee 100% protection against inversion. Using it is for own responsibility. The product is inflated by mouth.