Casio has added a purposeful edition to its iconic G-Shock lineup ahead of Breast Cancer Awareness Month. The new GMA-S2100PR-4AER applies a striking pastel pink treatment to the popular compact octagonal geometry, transforming a notoriously rugged analog-digital watch into a wearable symbol of health awareness and support. Retailing for approximately $109 (€99.90) in Europe, the watch pairs lightweight bio-based resin construction with direct financial backing for breast cancer research and patient care.
Rather than serving as a purely cosmetic recolor, this release establishes an ongoing charity partnership with Odyssea, a prominent French non-profit organization dedicated to fighting breast cancer. Beyond making a direct monetary donation to support medical initiatives, Casio is actively sponsoring participation entries for Odyssea charity races taking place in Paris and La Réunion. The model retains all of G-Shock's signature physical resilience while providing a smaller profile tailored for comfortable daily wear.
Purpose-Driven Design Meets the Octagonal Silhouette
Visually, the GMA-S2100PR-4AER adopts a monochromatic pastel pink palette that spans its bezel, resin strap, dial face, and hand markers. The most notable design tweak rests at the 9 o'clock position, where Casio replaced the standard day-of-the-week indicator hand with a pink ribbon emblem, the globally recognized symbol for breast cancer awareness. This subtle visual cue gives the dial a distinct character without cluttering its overall legibility.
In terms of structural architecture, the watch utilizes Casio's Carbon Core Guard structure. The internal case incorporates carbon fiber reinforcement to absorb heavy impacts while keeping dimensions minimal. Measuring 46.2 x 42.9 x 11.2 mm and weighing just 41 grams, it sits significantly lower and lighter on the wrist than traditional full-sized G-Shock models. Additionally, the outer bezel and wristband are molded from eco-conscious bio-based resins derived from renewable organic materials, reflecting a broader effort across Casio's catalog to diminish environmental impact.
Standard Field Durability and Utility Specs
Beneath its soft colorway, the GMA-S2100PR-4AER maintains the heavy-duty specifications expected of the G-Shock badge. The watch boasts a 200-meter water resistance rating alongside comprehensive shock resistance, making it fully capable of handling swimming, water sports, or harsh physical environments. Low-light visibility is handled by a dual LED illumination setup, which lights up both the analog dial face and the small digital display window situated in the lower-right quadrant.
The digital movement packs a versatile suite of day-to-day timekeeping utilities. Wearers have access to a world time engine covering 31 distinct time zones across 48 cities, a 1/100-second precision stopwatch, a 24-hour countdown timer, and five independent daily alarms. Powering the movement are two standard SR726W silver-oxide coin batteries, engineered to deliver a stable three-year battery lifespan before requiring replacement.
Pricing, Retail Channels, and Global Availability
The Casio G-Shock GMA-S2100PR-4AER officially launches in October 2026 to coincide with global Breast Cancer Awareness Month activities. European customers can purchase the watch for €99.90 (approximately $109) through Casio's online storefront, select brick-and-mortar jewelers, and the official Odyssea web portal.
While Casio has created an official product listing for the United States market, official US dollar pricing and local fulfillment schedules have not yet been formally confirmed. However, stateside availability is anticipated around the same fall timeframe, offering wristwatch enthusiasts and supporters a durable way to contribute to a crucial cause.
