Earthwool R2.5 FloorShield Underfloor batt is manufactured from durable silicone coated glasswool and is faced with an ECOSE¨ glass veil, providing a wind-wash barrier. The wind-wash barrier provides protection from air movement under the floor. It will also will improve the thermal comfort and energy efficiency of the building in which it has been installed thus keeping it cool in summer and warm in winter.