Knauf Insulation mineral wool products made with ECOSE® Technology don't look or feel like any insulation you've ever experienced. It uses revolutionary, new, formaldehyde-free binder technology, based on rapidly renewable materials instead of petro-based chemicals commonly used in other insulation products. ECOSE Technology, bio-based binder born from 5 years of intensive research brings super soft feel and naturally brown colour to the new generation of mineral wool insulation. The natural brown colour represents a level of sustainability and handling never before achieved.