Casio is joining forces with the Breast Cancer Research Foundation to launch the Pink Ribbon GMAS145PK-4A G-Shock, a single-tone pink timepiece created to support lifesaving breast cancer research. Alongside the release, Casio has donated $25,000 to BCRF, underscoring a continued commitment to the cause. The watch goes on sale October 1, 2025, with an MSRP of $110.
Designed to echo the signature Pink Ribbon hue, the GMAS145PK-4A stands out with a unified pink case, strap, logos, and minute markers, plus inverted (negative) LCD displays for a bold, modern look. It builds on earlier pink G-Shock styling but shifts to a clean, single-color aesthetic that pairs easily with everyday wear.
True to G-Shock toughness, a raised bezel helps protect the module from impacts, while 200-meter water resistance makes it ready for swimming and water adventure. Performance features include a 1/1000-second stopwatch for precision timing, a countdown timer, five daily alarms, 48-city world time, and an auto LED amber light for after-dark readability. The case measures 49 × 45.9 × 15.8 mm and the watch weighs 56 g, striking a balance between durability and comfort.
This release follows previous BCRF collaborations such as the DW5600PK-1 and GMDS5610PK-4, expanding Casio’s lineup of purpose-driven pink models and offering fans another way to show support. With its striking monochrome design, rugged G-Shock build, and everyday utility, the GMAS145PK-4A Pink Ribbon edition delivers style with a mission—and a clear message of solidarity.
