Winding is not necessary and these timepieces will run practically forever with little or no maintenance. Comfortable to wear, sleek design and classic look. The smooth lining case and the conservative oyster type bracelet are made of solid stainless steel. While luminous watch hands glow in the dark, making this a real advantage for night visibility. Sturdy and long-lasting bracelet and casing (35x7mm). The crown recessed at 4 o’clock position giving it a more sportier look. To add to that, the case back is transparent; and day and date displayed in a single window. Scratch and Shatter resistant crystal or glass. The transparent protective covering of the watch’s dial comes in a Hardlex crystal which assures excellent legibility as well as protection for your watch. Shock and Water resistant. These watches are tested to meet international standards for shock resistance and water pressure of 30-50 meters depth. Faucet spray or rain won’t hurt them as long as the case, crown and crystal remain intact. Not recommended for water sports of any kind.