This pack includes FIVE 100 sq. ft. rolls equaling a total of 500 sq. ft. 3-in-1 Vapor Barrier Underlayment is universal and affordable. Suitable for all types of subfloor including cement subfloor. Ideal for all flooring ranging from concrete slab, bamboo, floating, and wood floors, or even laminates engineered hardwood! This underlayment is 2mm thick and will provide you with basic performance and moisture protection. Special Features:Vapor 3-in-1 (Combo) Underlayment includes an attached moisture barrier, tape for easy installation, and overlap for moisture protection. It is 2mm thick and comes in 100 sq. ft. rolls. This vapor underlayment is used whenever there is a possibility of moisture coming up through the subfloor. This would usually be a concrete basement or an area with a crawl space directly underneath.Comfort: The 3-in-1 underlayment provides a cushion and moisture barrier that will protect your floor, keeping it insulated and free of leaks!Versatile: This underlayment is suitable for all flooring ranging from concrete slab, bamboo, floating and wood floors, or even laminates engineered hardwood!Separate Packaging: Each roll is separately packaged in its own plastic wrapper to ensure safety!