Outer and lining are both 100% polyester Retro-reflective paneling on front and back provides 360-degree visibility in low light Multiple interior and exterior pockets Detachable shoulder strap Dimensions: 11.5 by 11 by 8.5 inches, or 29 by 28 by 21.5 cm Total weight is 1 pound, 9 oz, or 710 grams