Jobst Anti-Em are seamless support stockings and the compression gradually decreases up the leg so venous return is not impeded. (exmed.net)
The calf muscle is the furthest large muscle away from the heart which will improve venous return when compressed. (cyclingtips.com)
Compression stockings (CS) have traditionally been designed for and used by populations suffering from venous return insufficiency (VI) secondary to a number of diseases or disabilities (20,22) or at risk for developing deep vein thrombosis (23). (journals.lww.com)