GRF MEDIUM is the biomechanical sock designed for sports activities where leaps, jumps, impacts and twisting of the foot play a major role, such as Basketball, Volleyball, Handball, Crossfit, Hyrox and many others. It improves all biomechanical functions related to the foot, heel and ankle, supports technical movements during such activities and stimulates venous return for ideal muscle oxygenation and faster recovery. In addition, it reduces GROUND REACTION FORCEvibrations that can generate micro-trauma and inflammation to all muscle and tendon structures, providing protection from injury and wear and tear on the body recovery.