5 in 1 Sound/Thermal/Vapor barrier,Odorless,Acoustics, 3mm, 400sqft underlayment
SPC, EVP, Rigid Core: 4 mm without attached underlay; 4.5 mm or + without underlay or with 1 mm underlay. WPC: 6 mm without attached underlay; 6.5 mm or + without underlay or with 1 mm underlay;. Laminate, Bamboo, Engineered and Hardwood floor: 8 mm or thickness without attached underlay or with 1 mm underlay.