Left over vinyl underlay. There’s close to about 50ish sq ft. Feel free to check. Here’s the original product from Home Depot Lifeproof Universal Underlayment Engineered Hardwood & Laminate for Luxury Vinyl Plank https://www.homedepot.ca/product/lifeproof-100-sq-ft-universal-underlayment-engineered-hardwood-laminate-for-luxury-vinyl-plank/1001582933?