Rust is made of stainless steel and crafted from African Sandalwood. The oil in sandalwood has been used for centuries in cosmetics, eastern medicine, and religious ceremonies. It is water-resistant. The case diameter is 44mm. Quality mechanical movement. Glass is made of Sapphire, which is known in the luxury watch world as the definitive material for transparency and durability. It is colorless and optically clear. Mechanically, it is second only to diamond as the hardest and most scratch-resistant materials on earth. The thickness of the band is 23mm. It comes packaged in a premium R. Burnett Wooden Box and a link remover along with instructions to give you the perfect fit.