Springbond 9mm is top of the range stretch fit carpet underlay, made by texfelt, recommended for luxury use. It is lightweight, dust free, easy to cut and shape and has a smooth branded surface to aid pulling carpet over. Thickness: 9mm Sound insulation: 41dB Heat insulation: 2.3 tog Density: 100kg/m3 Roll area: 15m2 Material Type: Fibre Felt Roll size: 10m X 1.5m (15m2) Manufactured to BS5808 in the UK by Texfelt Underlay and Fibre Technology. Made from 100% recycled polythene using over 150 bottles per roll.