BY JESSICA TEICH, AND DANUSIA WNEK Good Housekeeping Institute
How we test hair dryer brushes:
In our most recent hair dryer brush tests, we evaluated 10 oval dryer brushes with Lab tests and at-home usability tests. In the Lab, we assessed drying speed and air flow and used thermocouples to measure each tool's temperature — our Lab pros logged 10,980 temperature readings as part of this test. We also measured quantitative factors like weight, size and cord length, and partnered with Quiet Mark, a third-party certifier, to assess each tool's loudness.