Type of mechanism - QUARTZ.Display - ANALOGICAL.Material Of Case - STEEL.Colour Of Case - SILVER.Material Of Bracelet - LEATHER.Colour Of Bracelet - BLUE.Dial Colour - BLUE.Glass type - MINERAL.Clousure - BUCKLE.Water resistence - NO.Diameter dial - 28MM.Special Functions - A contemporary design and a comfort without equal characterize these men's sunglasses from Boss.The contrast between acetate and metal highlights its modern structural form and the forefront rivets put an elegant note.The aesthetics of this model Size - One Size