The CW-X exercise tights are based on Wacoal Sports Science's "Conditioning Web" technology. There are support panels sewn into the tights that create light pressure around the knees, quads, hamstrings, and calves. This is meant to enhance performance, prevent injury, and lessen fatigue. I tested them by running on a treadmill, but they can also be used for cycling, hiking, skiing, and other high-energy activities.The tights are noticeably heavier than others I've used. The CoolMax material helped prevent me from overheating, but for gym work, they're a bit thick. Unlike many running tights, these sit at a comfortable waist level, and stay in place at the ankles without being too tight. Though I wasn't any less tired than usual by the end of my run, I really felt the support around my legs, particularly in the knee area. The tights' crisscross pattern is a bit flashy, so unless you're looking to catch people's attention, I'd opt for the black on black. The verdict: Cool for outdoor exercise, but for the gym, seek a cheaper, more practical option. Any questions? Write us at email@example.com.