Can-Do Exercise Band - Black, X-Heavy, 4 feet. Latex-Free. Cando? band single pack is used for rehabilitation, conditioning and training. Cando? high quality latex-free exercise band has been used by clinics and individuals since 1987. Its 5-inch wide Low-Powder Formulation is the most cost-effective Cando? band exerciser. Cando? band is highly effective when used alone, or with the vast selection of accessories. All exercise bands are lightweight, take up minimal room and are highly portable.