Compressport R2 v2 Oxygen Calf Sleeves Protect your knees over long distances with the Compressport R2 v2 Oxygen Calf Sleeves. Constructed using a compression gradient, the r2v2 oxygen calf tights increase blood flow and oxygen to the muscles. By increasing oxygen, the calf tights encourage the muscles to perform better, therefore, increasing overall performance and also facilitate recovery. The fiber used to create the compression gradient is also super breathable increasing ventilation and overall comfort. K-protect supports the patellar tendon and dampens vibration by up to 8%, allowing you to push to the limits with peace of mind. Additionally, a shock absorber uses 360� compression to dampen shocks and the effects they have on the muscles, veins, and joints reducing the risk of injury whilst a massaging fiber provides a micro-massage after every movement, reduces aching. Finally, the compressport r2 v2 is tearproof allowing you to run through the trails with confidence.