The Evolve Roadrunner shower head is not like other water saving shower heads. Yes, it has a 1.5 GPM, and yes, it does have a full, round face to give you as much water as possible without being a torrential rainstorm.
What makes this shower head different from the others is that it utilizes a completely unique mechanic to save water and energy by using your low water pressure and maximizing it efficiently.
ShowerStart technology is what powers this shower head, ensuring that you use your time in the shower effectively.
Perhaps the most interesting, and possibly the most confusing, thing about this shower head is the little cord on the side.
It is not for pausing water; instead, as you run your shower, it will determine how hot the water is getting. Once the water is hot enough, it slows the flow to a trickle.
Once this happens, you can lather up and pull the cord to resume your water flow like normal. This allows you to save water in the most cost effective way possible, as there is no way to forget to turn off the water while you shower.