Powerhold is a perfect name for this fabric - these bad boys stay in place. I feel totally supported in these leggings without feeling restricted. The mesh detailing on the lower leg looks super cool and they don't give you a camel (lol) like some other popular fitness brands. I went for a 10k run in these today and they didn't move at all. For size reference I'm 5'9 and 160 lbs and the M fit perfectly.
Serena recommended this style