New, Unused MARNA Marna Ashi Karuriina Hard Type, Black, 1 piece Stretch and shake for refreshed, light feet! Perfect for desk work or high heels, easily stretch your feet at the office. The acupressure on the soles of your feet feels pleasantly painful and warms them up. Foot sole stretches feel great and lead to healthy feet. Ankle stretches refresh your feet. Can be used with socks on.