The present invention includes a walking boot device which immobilizes the ankle at about a 90° angle using a single anterior post that is angled at about 90° at an ankle joint from a lateral view, and encompasses an anterior one half of a calf proximally, and a dorsal one half of a forefoot distally. The post includes medial and lateral wings. The present invention defines an area for a medial and lateral malleolus and is narrow at the ankle and wider at the calf for a more anatomical fit. The present invention is secured to a leg using hook and loop fastener (Velcro®) strapping attached proximally around the calf posteriorly, away from any bony prominences. The hook and loop fastener (Velcro®) strapping is attached to the medial and lateral wings through brackets that are riveted into the wings. The present invention further includes foam inserts and a pneumatic bladder.