The GR31000 women's timepiece has a smaller 40mm case size. The GR31010 has a gold tone case, beige strap and oval-shaped case and fluted bezel. The men's GR31012 SoBe Tech has a strap and case detailing designed like carbon fibre. The GR33100 SoBe Tech watch mixes a steel bracelet with a carbon fibre bezel and detailing. Rose gold coloured PVD and a chunky rubber strap make the GR33106 a stand-out watch.