The DX3Â Field offers classic design, a U.S. Patented durable fiber reinforced poly-resin case and a long list of performance features. Including a hardened mineral glass crystal, offset ergonomic crown, long lasting all-metal precision movement, 3 year battery, U.S. Patented heavy-duty DX3Â Zulu B-TYPE nylon webbing band, and Swiss super luminous hands.