Since 1881, Seiko has been dedicated to expanding the horizons of watchmaking. Today, the innovation continues with the advanced technology of Seiko Solar. Because it converts all types of light into energy, no battery replacement is ever required. With a twelve month power reserve and three bar water resistance, Seiko Tressia is as convenient for you as it is good for the planet. Tressia’s heart is in the right place. It is a special creation designed in support of the Go Red For Women movement.