This white Optimist buoyancy bag offers 48 liters of flotation and is made from polyurethane-coated nylon, providing half the weight and greater strength than traditional PVC or PVC-coated bags. Featuring a regular PVC non-return valve for quick inflation and deflation, it ensures efficient water displacement after capsizing. The 48-liter capacity is slightly heavier than 43-liter bags but significantly reduces water in the boat. Properly inflated, the bag will be soft to the touch, avoiding overinflation risks.