The Breitling Aeromarine Colt Automatic II has a calf leather band for superior comfort. It also has an automatic movement, so the wearer doesnt have to buy watch batteries anymore, the watch is powered simply by the daily movements of the user. It has a uni-directional bezel to track your daily activities, as well as a sapphire crystal which has been glareproofed on both sides for more accurate readings. Water resistant to 1500 feet!