Pull buoy is just a piece of rubber that you fill in with air and tie it to your waist as you swim in the open water. If you are not an avid open water swimmer, our description of this item may seem unimportant but let us tell you that your life may depend on it! We kid you not. The pull buoy could save your life so choose the best there is and we have the best there is for you. Shop with us today and swim safe!