The favorite with professional athletes for years has been redesigned to give better compression and heat retention. The legs have been extended 4" to provide complete coverage of quadriceps and hamstring area. The original high waist has been maintained for low back support. Provides beneficial heat retention during weight training and conditioning programs for low back muscles, hamstrings, goin, hips, quadriceps & waist. The 850 trunks are constructed of the thinner 1/16" neoprene for slightly less heat retention while maintaining uniform elastic compression. Both are available in black N2 material only. Please visit our website at http://www.proorthopedic.com/ for the size chart and measuring instructions.