Compressport pro racing socks bike v2 1compressports pro racing v21 bike socks are made of technical fabrics for optimum breathability and moisture transfer the seamless and non elastic upper layer prevents pressure on the legs while the ergonomic toe area ensures the toes are not smothered or compressed during training or racing protects achilles tendonthese bike socks feature 3d dots on the feet to stimulate blood circulation while other 3d dots protect the malleolus area and the achilles t