Part of the Octagonal series, G-SHOCK’s GM-2100 watch comes with an array of rugged qualities built to withstand outdoor use. It’s made with the label’s Core Guard technology - meaning it provides superior shock resistance through use of carbon fibre - and is encased in a hard mineral glass case with industrial bezel. Resin Case Mineral Glass Lens Resin Strap 5 Daily Alarms Shock & Scratch Resistant 200M Water Resistant LED Light Stopwatch Function