A multi-layer rolling fire curtain assembly positionable about an opening in a structure wall, comprising: a rotatable curtain roller having a longitudinal axis and positionable about the opening; a flexible multi-layer fire curtain comprising fire resistant material and being configured to be wrapped about the curtain roller and to be deployable from the curtain roller between an extended position wherein the opening is closed, and an open position, the multi-layer fire curtain having a first end fixed to the curtain roller, and a free end, the free end being movable in a moveable direction, upon rotation of the curtain roller, between a retracted position where the structure opening is at least partially uncovered, and an extended position where the multi-layer fire curtain covers at least a portion of the structure opening, the multi-layer fire curtain having: a fire resistant inner curtain layer arranged closer to the curtain roller, and a fire resistant outer curtain layer (8, 8') arranged opposite the inner curtain layer; the inner and outer curtain layers (20; 8, 8') being affixed to one another by a plurality of horizontally oriented connection seams, spaced apart from one another vertically to connect the inner and outer curtain layers (20; 8, 8') to each other, each connection seam extending across the width of at least one of the inner and outer curtain layers (20; 8, 8'), the connection seams being configured so that the outer and inner curtain layers (8, 8'; 20) are spaced apart by a plurality of baggy areas formed between adjacent ones of the connection seams; and first and second guide channels arranged along a right-side edge and left-side edge of the opening, respectively, wherein the multi-layer fire curtain has first and second lateral curtain edges; wherein each of the first and second lateral curtain edges is configured and arranged so as to be received in and guided along a respective one of the first and second guide channels; charactrized in that the width of the outer curtain layer (8, 8') is less than that of the inner curtain layer; and the inner and outer curtain layers (20; 8, 8') are connected only by the horizontally oriented connection seams, without using any vertical stitching to connect the inner and outer curtain layers (20; 8, 8'), such that the multi-layer fire curtain comprises a plurality of horizontal curtain vents, stretching along an entire horizontal extent, perpendicular to the deployment direction, of the outer curtain layer (8,8'). a rotatable curtain roller having a longitudinal axis and positionable about the opening; a flexible multi-layer fire curtain comprising fire resistant material and being configured to be wrapped about the curtain roller and to be deployable from the curtain roller between an extended position wherein the opening is closed, and an open position, the multi-layer fire curtain having a first end fixed to the curtain roller, and a free end, the free end being movable in a moveable direction, upon rotation of the curtain roller, between a retracted position where the structure opening is at least partially uncovered, and an extended position where the multi-layer fire curtain covers at least a portion of the structure opening, the multi-layer fire curtain having: a fire resistant inner curtain layer arranged closer to the curtain roller, and a fire resistant outer curtain layer (8, 8') arranged opposite the inner curtain layer; a fire resistant inner curtain layer arranged closer to the curtain roller, and a fire resistant outer curtain layer (8, 8') arranged opposite the inner curtain layer; the inner and outer curtain layers (20; 8, 8') being affixed to one another by a plurality of horizontally oriented connection seams, spaced apart from one another vertically to connect the inner and outer curtain layers (20; 8, 8') to each other, each connection seam extending across the width of at least one of the inner and outer curtain layers (20; 8, 8'), the connection seams being configured so that the outer and inner curtain layers (8, 8'; 20) are spaced apart by a plurality of baggy areas formed between adjacent ones of the connection seams; and first and second guide channels arranged along a right-side edge and left-side edge of the opening, respectively, wherein the multi-layer fire curtain has first and second lateral curtain edges; wherein each of the first and second lateral curtain edges is configured and arranged so as to be received in and guided along a respective one of the first and second guide channels; charactrized in that the width of the outer curtain layer (8, 8') is less than that of the inner curtain layer; and the inner and outer curtain layers (20; 8, 8') are connected only by the horizontally oriented connection seams, without using any vertical stitching to connect the inner and outer curtain layers (20; 8, 8'), such that the multi-layer fire curtain comprises a plurality of horizontal curtain vents, stretching along an entire horizontal extent, perpendicular to the deployment direction, of the outer curtain layer (8,8').