The Type B-15C Intermediate Flight Jacket was introduced by the U.S. Air Force in 1950 as a replacement for the Olive Drab B-15B, primarily to distinguish the USAF from other military branches through the use of the Air Force Blue colorway. The Type B-15C featured a tonal fur collar, but following a USAF directive in 1954, the B-15C was modified to replace the existing collar with a wool-knit collar, resulting in the B-15C MODIFIED seen here.

The directive was intended to reduce the flammability of the jacket and was also a response to changing cockpit conditions that required a larger helmet, which was incompatible with the fur collar seen on earlier B-15 models.

The process of removing the fur collar led to many examples with mismatched thread around the collar and at the rear waistband, where access was needed. The contrast white stitching on the TYPE B-15C MODIFIED from REAL McCOY MFG. CO. is true to this original detail. The inner labels also follow the directive that required modified jackets to be labeled as such to comply with MIL-SPEC.

The iconic MA-1 is a direct successor to the B-15C MODIFIED, making this jacket an incredibly important piece in the history of both military equipment and civilian menswear.

The B-15C (mod.) has been diligently recreated in Nylon 66 and benefits from Cotton/Wool Pile interlining.