FiberForce 850 is a blend of steel macrofibers and synthetic microfibers. FiberForce 850 combines a Type V steel macrofiber with a monofilament microfiber. The specific blend ratio is 23 lb/1 lb (steel macrofiber/synthetic microfiber) per 24 lb bag. This blended technology is developed for post-first crack reinforcement with enhanced plastic shrinkage/settlement crack control.