Owens Corning. The manufacturer says its entire line of fiberglass insulation products has been certified by Scientific Certification Systems to contain an average of 35% recycled content, 5% of which comes from post-consumer sources. ProPink fiberglass insulation carries Greenguard certification, including its highest level with Greenguard Children & Schools product emission standards. 800.438.7465. www.owenscorning.com.