Abstract: An open-water swim training device provides open-water swimmers a stronger, safer swim without performance or stroke. The device includes a buoyant body having a tapered front end and an opening positioned in an upper surface thereof for removably receiving nutrition and/or hydration. A first end of a tether is connected to the tapered front end of the buoyant body. A waistband for removably connecting the training device to a swimmer is connected to a second end of the tether. A visibility marker is also affixed to the buoyant body.