The Blue Blood W Set [Limited Quantity]Special Event 62% off + 1 Extra Strap (First Order, First Mail) Limited Quantity More Info The case: 100% Zebra Wood and Stainless Steel. This wood has a high density which together with the steel completely blocks the water from getting into the movement. Zebra Wood has an obvious wood grains. Zebra wood will turn darker and shinier when used for a long time. The straps: the leather band is a pre adjusted buckle which required one off size