Red Lion Compression Leg Sleeves provide dual action support and compression to the calf and shin area for improved athletic performance and recovery. Compression improves oxygen blood flow allowing athletes to train harder and recover faster. Special seamless knitting process for a fabric that is soft and breathlable. The sleeves can be worn during training and racing to help support muscles and increase oxygen blood flow to the muscles of the lower leg. Leg Sleeves are also valuable recovery aids since the more oxygen the muscles receive, the faster they recovery allowing athletes to push the envelope in their training. Ideal for runners, cyclists and triathletes. Ships in pairs. Sizing information: S/M has a length of 9-10.5" and fits a child to young adult, the M/L has a length of 10.5-12" and fits an adult.