2XU is one good brand of compression wear according to reviewers. Other brands that tend to score highly in reviews include Compressport F-Like Full Leg, CW-X Stabilyx and Orca Killa Kompression tights.
Compression tights are a type of athletic wear designed to improve circulation to the muscles while running or doing other strenuous exercise. Several scientific studies have been conducted to determine whether improved circulation can lead to improved athletic performance, and no significant link has been found. However, one study did find that recovery times were faster for individuals who wore compression tights during their workout, meaning that they tended to feel better and be able to perform better the next day.