Khaki. Acceptable size for carry-on by FAA regulations and most airlines. Overall size 22" long x 14" wide x 9" high (45 linear inches). Approximate capacity 2380 cubic inches. Main compartment approximately 21" x 13" x 8" with tie down strap. Top exterior sleeve pocket 10" x 6". Internal mesh pockets, External slip pockets, PALS attachment webbing, 2" padded shoulder, concealable contoured built-in backpack straps with sternum strap. Can hold up to 100 oz (3L) hydration reservoir. lon thread (stronger than ordinary industry standard nylon thread). #AS-100 high grade closed-cell foam padding material for superior shock protection. High tensile strength nylon webbing. #10 high strength zippers and zipper tracks. UTX-Duraflex nylon buckles for low sound closures.