Casio Men's G-SHOCK G-STEEL Radio Solar Mid-Size GST-W300G-1A9JFProduct Highlights While maintaining the traditional Layer Guard structure and functions, we have achieved a downsizing of approximately 90% for the entire case. The significant reduction in module size enables the downsizing and slimming of the case, resulting in a mid size design. We pay attention to detail in finishing, with the resin made indexes that withstand impact, featuring a face design that combines toughness and beauty through laser cut