The BUDDYSWIM safety buoy for open water swimmers provides optimal visibility from boats and/or from shore. Its great buoyancy allows the swimmer to rest and use it as a float if necessary. In addition, its 100% watertight interior compartment allows you to keep personal items completely dry while you swim. The BUDDYSWIM 28Litre Drybag Buoy has two independent air chambers so that the buoy does not deflate completely in the event of a puncture or loss of air. A FREE yellow silicone cap is included to increase the swimmer's points of visibility in the water. In no case does the buoy replace a life jacket.