OC R-15 3.5" x 15" - 93" UNFACED INSUL BATTS 77.5-SQFT (8-BATTS) | R-15 Fiberglass Unfaced Batts
3-1/2" x 15" x 93"
8 Pieces (Batts) per bundle
77.5 Square foot per bundle
"R'' stands for resistance to heat flow. The higher the R-value the greater the insulating power.