Abstract: A panel of acoustically absorbent material with at least one side carrying a portion of looped material to engage with the hooked structures of a mounting patch placed on a mounting substrate is provided. The panel may be releasably attached to the mounting substrate via the association of the looped material with the mounting patch, such that the panel of acoustically absorbent material may be removed from the mounting substrate without damaging the structural integrity of the panel. A method of releasably attaching an acoustically absorbent material to a mounting substrate is also provided.