Casio G-Shock GM-S2100MF-1AER Midnight Fog Series Grey Silicone Strap Men's/Women's WatchCore Features of the Casio G Shock Carbon Core Octagon: G Shock watches are water resistant up to over 10 bars or 100 meters. The hands and the indices of the models are luminescent. This watch pays homage to the original model through its retro inspired octagonal bezel. Model Specifications: GM S2100MF 1AER The metallic silver coloured case of the watch is made of resin with a stainless steel bezel. A black resin strap secures the watch. The metallic