Casio's new Pro Trek watch is made of corn and castor seeds

The Casio Pro Trek PRW61 is the first Pro Trek model to be made using renewable biomass plastics, but is still just as tough as you need an outdoor watch to be.

Casio Pro Trek Green Watch PRG-340-3

Casio Men's Pro Trek Triple Sensor Solar Powered Watch made of Bio-Based Plastic PRW6611Y-1A

Pro Trek PRW-6611Y-1 and PRW-6621Y-1: Eco-friendly biomass models with large analog-digital display

Casio and Mountain Apparel Brand, Mammut Link Up for the Latest Addition to PRO TREK line - Worn & Wound

This retro-inspired Casio adventure watch is made from beans yes, really

Casio Launches Greenest Pro Trek – International Wristwatch

PRG340T-7D, Protrek Watches

Casio Pro Trek x Mammut

Casio to Release PRO TREK with Biomass Plastics and Dual-Layer LCD