Born in 2008 the Calf R2 is the number 1 selling compression guard in over 70 countries & has covered the legs of the top triathletes in the world including Frederik Van Lierde & Caroline Steffen In addition to its thermo-regulating benefits the R2 calf guards accelerate venous return preventing blood from stagnating in calves to help with recovery through the use of medically approved gradual compression Its shock & vibration absorption on muscles veins & joints combined with its patented massaging effectfibre increases resistance to effort & studies have showed a significant reduction in lactic acid during effort Its recovery performance enhancing properties & its lightweight & tear proof material make the R2 ideal to use during & after racing or training