#$%^&*AU2011239343A120120524.pdf#####A B S T R A C T The orthosis (10) comprises an elastic compressive distal portion (14) extending upwards from the ankle and 5 associated with an adjoining containment proximal portion (16) covering a region of the calf extending between the level (Bi) of the junction point between the Achilles tendon and the calf muscle and the level (D) situated beneath the tibial tuberosity. This containment proximal 10 portion is an essentially non-elastic deformable tubular portion made by knitting with a thermoformable yarn, and it is knitted continuously with the elastic compressive distal portion. 151/2 2 0 10 I10 1818 16 14 Bi 12 12 FI G-1 FIG-2