Veredus Olympus Vento Front Tendon Boots are show jumping anterior tendon boots with double ventilation. • DOUBLE VENTILATION the heat released from the horse’s leg passes through the microperforated neoprene layer and is then distributed in the 3 D mesh ducted fabric Thanks to this material the ventilation is everywhere• Tendon protection in EVA• DOUBLE INJECTION : shell made of Bayer Polyurethane with different density and rigidity.• HIGH DENSITY INSERT : more resistant, protective against shocks• LOWER DENSITY SHELL : more flexible to favour the natural movement.• ANATOMICAL SHAPE : the shell has an anatomical form that perfectly corresponds to the shape of the limb• ELASTIC STRAPS : easily adjustable, maintain correct tension, avoid excessive pressure.• QUICK RELEASE CLOSURE : practical, quick and secure. Sizing Guideline To choose the right size, it is necessary to measure the circumference of the front cannon bone. Take a tape measure and wrap it around the middle of the cannon bone without tightening too much to take the measurement. Circumference of Front Cannon Bone Small 17 cm - 20 cm (6.5 to 9 inches) Medium 20 cm - 23 cm (9 to 10 inches) Large Over 23 cm (over 10 inches)