The Pergo FloorMate EZ Install Fanfold Underlayment with Moisture Barrier is a high-quality flooring accessory designed for easy installation. Made with 3mm thickness and measuring 4 x 25 ft, this product is perfect for ensuring a smooth and even floor surface. Its mold and mildew resistant feature adds durability and protection against moisture, making it a reliable choice for any home or building project. Proudly made in the United States by the trusted brand Pergo, this underlayment is a must-have for any flooring installation.