NEW from the Shop at Walden Pond: A number of Walden Pond swimmers wear brightly-colored, lightweight, inflatable buoys that make them more visible to lifeguards, boaters and by-standers. One can also be used in an emergency as a flotation device or to calm distressed swimmers. It will not interfere with swimming. And our specially-designed one is emblazoned with a copy of Henry Thoreau's Walden Pond survey map! An excellent accessory for open water swimmers, triathletes, or anyone else who would benefit from added confidence in the water. This Large (25" x 14") size is suggested for swimmers over 190 pounds and includes a dry bag to stow your belongings. A Shop at Walden Pond exclusive.