Not only is this shirt using 50% less energy, fewer chemicals it still combines the technology needed to keep you dry with it's leading technology in evaporative cooling. Don't just help the planet, help yourself with this one. Cocona: activated carbon, ultimate in EVAporative cooling. Drydye : no water used in the dyeing process, thus saving 25 liters per t-shirt. UPF 25. Polyester.