Description
The Casio Pro Trek PRW-35Y-3B (also referenced as PRW-35Y-3 / PRW-35Y-3BDR) is an advanced, high-performance Japanese digital outdoor timepiece from Casio’s acclaimed Pro Trek Climber Line. Celebrated globally among mountaineers, outdoor adventurers, and tactical watch enthusiasts by its popular series nicknames—the "Climber Line", "Triple Sensor", or "Bio-Mass Solar Trekker"—this 44.6mm timepiece pairs a lightweight eco-friendly biomass plastic case with a high-contrast digital LCD display, advanced Triple Sensor Version 3 technology, Tough Solar charging, Multi-Band 6 atomic time calibration, low-temperature resistance down to -10°C (14°F), a certified 100-meter water resistance rating, and a flexible olive green bio-based resin strap. Engineered specifically for trekking, hiking, and alpine expeditions, it delivers exceptional field accuracy, compact ergonomics, and sustainable performance on the wrist. The defining visual highlight of this PRW-35Y-3B reference is its purposeful, nature-inspired outdoor styling, combining a sleek dark ion-plated stainless steel bezel ring with an earthy olive green case and strap. Set beneath a scratch-resistant mineral crystal, the large, high-contrast digital LCD interface presents bold, intuitive readouts of directional bearings, barometric pressure tendencies, altitude metrics, and temperature, alongside primary timekeeping data. The harmonic interplay between the utilitarian digital interface, olive green bio-mass housing, and tactical dark hardware delivers a commanding, outdoor-ready presence on the wrist. Beneath its rugged exterior, the watch is powered by Casio’s advanced in-house Triple Sensor Version 3 digital quartz module. Driven by Tough Solar technology, the timepiece continuously converts natural sunlight and indoor ambient light into electrical energy, operating for approximately 6 months under normal use on a full charge (and up to 26 months on Power Saving Mode). The integrated Multi-Band 6 atomic radio-controlled receiver captures calibration signals across North America, Europe, Japan, and China to ensure split-second accuracy. The high-precision sensor suite delivers real-time environmental data: The case is designed with optimized slim Climber Line dimensions, measuring 44.6mm in case width with a low-profile case thickness of 13.0mm and a lug-to-lug distance of 51.2mm, weighing an ultra-lightweight 45 grams to prevent wrist fatigue during long ascents. Both the case, bezel, caseback, and soft urethane strap are crafted using eco-friendly biomass plastics derived from renewable organic resources. Built to endure harsh alpine environments, the watch features low-temperature resistance down to -10°C / 14°F and achieves a certified 100-meter (10 bar / 330 ft) water resistance rating suitable for river crossings, heavy rain, swimming, and water sports. Nighttime illumination is provided by a high-brightness Full-Auto Super Illuminator LED backlight with selectable afterglow. The timepiece comes completed on a flexible olive green bio-mass resin strap, secured by a solid stainless steel pin buckle clasp.
