This mast float significantly reduces the risk of turtling a boat by providing 8 liters of buoyancy to the top of the mast. Its a great product for instructional programs, any boat with small/beginning sailors or anyone that just hates washing off their muddy sails. The unique design features two 4-liter inflatable tubes that are connected together with a piece of sailcloth. Simply fold the sailcloth connector around the bolt rope of the sail, slide it into the sailtrack and up it goes. Each tube has a length of 32 in. (80cm). This product is meant for smaller dinghies only and may not guarantee 100% protection against inversion/turtling on larger or heavier boats.