A towel system, assembly, and method enable a user to quickly identify, retrieve, and replace a moisture-absorbent medium. The towel system comprises, in combination, a circular towel, a support structure, and certain fastening structure. The towel is constructed from a moisture-absorbent medium and comprises a circular periphery, an anterior surface, and a posterior surface. The support structure comprises a vertical support surface. The fastening structure has a fastened thickness and is cooperable with the towel and the support surface for enabling a user to removably fasten the towel to the support surface. The fastening structure comprises towel-based and support-based structures. The fastening structure enables the user to removably fasten the towel adjacent the support surface a distance substantially equal to the fastened thickness for preventing contact between the towel and support surface and enabling the towel to hang within an air space surrounding the anterior and posterior surfaces.