Abstract: A flexible protective support wrap or boot for supporting and protecting the lower leg of a horse, including the fetlock joint, is formed of a panel having a layer of flexible support material, an outer layer of closed loop fabric and an inner layer of woven fabric for contact with the horse's leg. Spaced apart pocket or cup portions are formed in the panel to engage the fetlock joint in overlying relationship to each other when the wrap is secured around the leg. A splint bone protection pad may be secured between and spaced from the side edges and provided with a ridge for locating the pad between the cannon bone and the front deep digital flexor tendon. The entire panel may include a layer of shock absorbing material in addition to the flexible support layer. Multiple spaced apart fastener straps with hook fastener pads are secured to the panel adjacent one side edge for engagement with the loop fabric layer to secure the wrap around the leg in snug fitting relationship.