What is an alternative name for fiberglass flexible batt insulation?

The correct alternative name for fiberglass flexible batt insulation is "Fiberglass wool." This term refers to the material's fibrous structure, which is created by spinning molten glass into fine strands that trap air, providing excellent thermal insulation properties. This type of insulation is popular in residential and commercial applications due to its effectiveness in controlling heat flow and sound.

The other terms listed do not accurately describe fiberglass flexible batt insulation. "AW wool" is not a recognized term within the insulation industry. "Eco batt" typically refers to a type of insulation that may be made from recycled materials but does not specifically denote fiberglass. "Rock wool," although it is a type of insulation, is made from natural or synthetic rock materials, which differ fundamentally from fiberglass.