Get the PRO TREK PRG-601YB with cloth band featuring materials expected to reduce environmental impact and big bold index numbers for an easy read. The digital compass barometer/altimeter and thermometer Triple Sensor helps you stay on top of changes in the natural environment while Tough Solar converts light into the energy needed to power the watch. The raised index numbers on the dial are boldly balanced with a wide ion-plated stainless steel bezel. The resin components used for the case and case back are made with bio-based resin materials and the cloth band is made with materials from recycled plastic bottles. These materials are expected to reduce the ecological footprint of this watch.