An enclosure for protecting a load comprises a truck bed to hold items, a front wall affixed to a proximal end of a width of the truck bed, and a rear wall affixed to a distal end of the width. A main header member runs along the length of the truck bed connecting the rear and front walls to form a central mounting point along a length of the truck bed that is disposed at a maximum height of the rear wall and the front wall. A passenger side gull wing door and a driver side gull wing door are mounted to the main header member by a plurality of hinges affixed to the main header member and which provide a movable joint for the gull wing doors. One or more hydraulic lift cylinders are operative to raise and lower a respective gull wing door.