An orthopedic walker boot for wearing on a lower limb of a wearer has a rigid external shell and a pliant internal boot received within the external shell. The internal boot includes a leg panel having an inflatable bladder and a pump panel having a pump for inflating the bladder. The leg panel is configured to wrap around a leg of a wearer and the external shell is sized and configured to receive the internal boot with the leg of the wearer wrapped therein. The pump panel has a first end fixably attached to the leg panel and has a selective and releasable operational orientation, wherein the pump panel is in an overlapping outer position relative to the leg panel.