The Run Energizer Sock applies a gradual compression to your foot, this enables your blood to re-circulate to your heart faster. This improves circulation and saves energy on those longer training runs/races.
These socks have made me run many half marathon PBs, finishing stronger and less achy. Hence giving me the confidence to sign up to challenge a full marathon. I was sceptical at first, but have been using them for quite a few runs now, and have put my mind at rest that they do what they say. Recommended for longer runs."
SIZES: S = 3 - 5.5
M = 6 - 7.5
L = 8 - 9.5
XL = 10 - 12