Fire resistant double-knit fabric

A double-knit fabric having an upper surface and a lower surface and having a warp and weft direction, wherein the weft direction is perpendicular to the warp direction, wherein the double-knit fabric comprises:

• a first knit layer comprising a plurality of first yarns and a plurality of first elastic yarns, wherein the first knit layer forms the upper surface of the double-knit fabric, wherein the first yarns comprise a plurality of first staple fibers;
• a second knit layer comprising a plurality of second yarns, wherein the second knit layer forms the lower surface of the double-knit fabric, wherein the second yarns comprise a plurality of second staple fibers;
• and,
• a plurality of stuffer yarns, wherein the stuffer yarns are located between the first knit layer and the second knit layer;
• wherein the double-knit fabric comprises a plurality of anchored lines and a plurality of detached regions, wherein the plurality of detached regions are bounded by the anchored lines, wherein in the anchored lines the first yarns from the first fabric layer and the second yarns from the second fabric layer are knitted together, and wherein in the detached regions the first fabric layer and second fabric layer are unattached;
• wherein the first knit layer and the second knit layer are integrated within the anchored lines at least one method selected from the group consisting of interlacing first yarns of the first knit layer among the second yarns of the second knit layer, interlacing the second yarns of the second layer among the first yarns of the first knit layer, and interlacing a plurality of third yarns among the first yarns of the first knit layer and the second yarns of the second knit layer;
• wherein the plurality of anchored lines are in at least one of the warp or weft directions, wherein the double-knit fabric the first knit layer has an undulating surface in at least 90% by number of the detached regions defined as the upper surface containing at least 3 inflection points in the warp or weft directions, wherein an inflection point is the point at which the surface switches from either concave to convex or convex to concave.