A blood flow stimulating device comprising a boot comprising a sole and an upper； a sock disposed within the boot； and a bladder disposed within or on the sock, wherein the bladder is configured to undergo repeated inflation and deflation so as to stimulate blood flow in a wearer of the blood flow stimulating device, wherein the sock further comprises a toe region, a heel region and a raised portion between the toe region and the heel region that, in use, reduces the distance between the sock and a foot of a wearer of the blood flow stimulating device at the raised portion of the sock.
