PVC (Rubber) 3.5" hook & loop
The Boeing (formerly Rockwell International) B-1B Lancer is the improved variant of the B-1A, which was cancelled in 1977. Initiated in 1981, the first production model of this long-range, multi-role, heavy bomber flew in October 1984. The first operational B-1B was delivered to Dyess Air Force Base, Texas, in June 1985, and the final B-1B was delivered in 1988.
*information sourced from nationalmuseum.af.mil*