Size: 1m Wide x 2mm thick x 50Lm long  (50sqm per Roll) comes with plastic & double sided tape The superior underlay, Quiet-Step Combi-Lay is a superior product and is constructed of high density polyolefin copolymer resin which effectively reduces the hollow and often “clunky” foot noise associated with floating floors. Independent University tests show a 30% or more reduction in reflected foot noise for the user. Featuring integrated damp proof, removing the need for additional damp proof layers in most instances*.