Reactor’s top selling style for our first five years, Critical Mass offers classic good looks that dress up well but still play hard. If you could have only one watch, a Critical Mass is hard to beat, as it performs flawlessly in the office or in the ocean. Also, available in a larger version for men


  • Individually depth tested to 200 M / 660 ft.
  • Unidirectional rotating timing bezel
  • Triple o-ring screw down crown for superior water resistance
  • Secure screw bar case-to-band interface for superior strength
  • Free-floating lug system for a comfortable fit on any size wrist


  • Case Material                    Stainless, Gold-plated 2-tone Stainless
  • Band                                    Stainless Bracelet, Gold-plated 2-tone Stainless Bracelet
  • Depth Rating                     Individually depth tested to 200 M / 660 ft.
  • Movement                         Quartz with day/date
  • Illumination                       Superluminova dial markings and hands
  • Case Size                            34.6mm
  • Case Thickness                  11.8mm
  • Weight                                129 grams
  • Width at Lug                     23.7mm
  • Width at Clasp                  18mm