Tredaire Elite 11sqm Sponge Rubber Carpet Underlay: 4/6 Hard-Wearing Durability, 5/6 Extra Comfort, 9.75mm Thick, 1.19 Tog, 120lb, 1.33m x 8.24m Roll Suitable for stretch-fit installation of carpets. Perfect for lounge, dining room & main bedrooms. The Tredaire Elite 9.75mm premium luxury carpet underlay provides outstanding comfort & carpet protection around the home. It's a high density, textured flat, Tredaire sponge rubber underlay which will support your carpet throughout its lifetime. Excellent sound insulation capabilities. Easy to fit.