Top flap closure with button magnet. Interior top drawstring closure. Vinyl trims. Adjustable web shoulder straps with vinyl trims. Metal hardware. Adjustable vinyl cargo straps to carry a yoga mat, jacket or towel. Exterior side pockets. Interior zippered pocket. Polyester lining. Volume: 1380 cu. in. [ 23L ]. Size: 12.75 x 16 x 5" [ 32 x 41 x 13cm ]. Materials: 20 oz. Cotton Canvas.