This high quality dog box is designed by bird hunters for bird hunters. Constructed from 1'' thick side panels consisting of 3/4'' foam board plus luan plywood interior lining for maximum insulation. This combination of materials makes a dog box that offers a wickable R5+ insulation factor and creates an interior environment that is warmer in cold weather and cooler in hot weather and will move moisture away from your dogs. Every feature is well thought out and designed for the safety and comfort of your bird hunting partners and best friends, and your own peace of mind. The carpeted top storage compartment measures 43.5''W x 37.5''L x 5.5''H, and locks with a key. The all welded lid is light and durable, weathertight, and has a full-length piano hinge and dual pneumatic lift cylinders making opening a snap and providing stable support to hold the lid open even in the strongest winds. Highly durable double 13''W x 15.25''H full-length piano-hinged doors offer "jailhouse style" vents with removable vent shields for use in warm weather. Keep them in place for colder weather to retain the heat inside the dog compartments. Interior divider panel is cross-ventilated as well. Door clasps have padlock holes for securing your dogs in the box. Sides offer ''jailhouse style'' window vents with sliding vent shields to accomodate your dogs in the full range of weather conditions. Exterior measures 46'' x 40''. Specifications: Floor is constructed of smooth surface PVC for easy clean upControlled cross-ventilation through use of "jailhouse style" window and door ventsEach dog compartment offers 17.25" head height, 21.5" shoulder room, 37.5" depthWeathertight lid to keep your gear dryDual heavy duty tie down rings Dual heavy duty carry handles positioned for good balance when lifting