For its latest G-Steel models, Casio is using carbon construction to reduce their cases sizes by 2.0mm while maintaining the durability expected in a G-Shock timepiece. The watches feature Carbon Core Guard Structures to create a rugged, lightweight design and they feature a number of the key G-Shock technologies such as 200M water resistance, shock resistance, world time, a stopwatch and countdown timer, five alarms, and a full automatic calendar. The watches also feature Bluetooth connectivity, solar charging, a hand retract function, and full auto double LED lights. 

The watches are available this June with a silver face with a stainless steel band or an all-black polyurethane band. 

$280-$350, gshock.com