A device made of an elastomeric material formed in a circular or elliptical or oval shape having an exterior surface and an interior surface and a non-uniform thickness, with opposing ends having a decreased thickness. The interior surface may include one or more slip resistant elements. The exterior of the device may also include at least one slip resistant element as well as one or more artistic or design elements or overlays. The device is lightweight and may be made more buoyant with one or more air pockets or air spaces located between the exterior and the interior surfaces and walls forming the surfaces. In operation, one or more devices are removably and adjustably positioned around an extremity portion of a person, such as both ankles, both feet, both calves, both knees, both thighs, both hands, both wrists, both lower arms, both upper arms, or both elbows.