Sporting a brushed stainless steel surface, and with a record-breaking slim profile of only 8.9mm thickness, the HE720 demonstrates once again the company's consistently strong ability to combine top performance with style.
Though that also makes it more flexible (and makes the ability to grind and polish the glass to create a light-capturing parabolic surface without actually breaking the thing all the more impressive), this flexibility can be exploited to keep the reflective surface in shape.
The "detergent" action of soap comes from its ability to attach to oily, grimy surfaces, with the "water-hating" end breaking up molecules at that surface.