Ravens replace artificial surface M&T The Ravens are putting finishing touches on the new turf at M&T Bank Stadium this week, which means the team will stay with an artificial surface for the foreseeable future. This SportExe field, which features 1billion blades of synthetic fibers with a base of sand and granular rubber, is essentially the same as the highly rated one that has been in place for seven years, but the older turf had begun to lose its softness.