Flame resistant fabrics

A fabric formed by first yarns and second yarns and comprising a first fabric direction, a second fabric direction opposite the first fabric direction, a first fabric side, and a second fabric side opposite the first fabric side, wherein:

• i. the first yarns comprise a first fiber blend comprising approximately 5-30% aramid fibers, 50-80% modacrylic fibers, and 5-15% cellulosic fibers;
• ii. the aramid fibers and the modacrylic fibers of the first fiber blend constitute at least 70% of the first fiber blend;
• iii. the first fiber blend comprises more modacrylic fibers than aramid fibers;
• iv. the second yarns comprises a second fiber blend that is different from the first fiber blend and that comprises aramid fibers and non-FR cellulosic fibers;
• v. the second fiber blend is devoid of modacrylic fibers;
• vi. the second fiber blend comprises at least 50% non-FR cellulosic fibers;
• vii. the aramid fibers of the second fiber blend constitute 40% or less of the second fiber blend;
• viii. the first yarns are predominantly exposed on the first fabric side and the second yarns are predominantly exposed on the second fabric side;
• ix. the first yarns are provided only in the first fabric direction and the second yarns are provided only in the second fabric direction;
• x. the fabric has a char length of 6 inches or less and an afterflame of 2 seconds or less when tested pursuant to ASTM D6413 (2015);
• xi. the fabric has a fabric weight between 5 to 7 ounces per square yard, inclusive;
• and
• xii. the fabric has an arc rating of at least 8 cal/cm2 when tested pursuant to ASTM F1959 (2014).