Arrosto European Oak engineered hardwood floor by Monarch Plank Hardwood Flooring. Experience natural beauty of European Oak sourced from responsibly managed forests in Europe and the U.S., with use of the most eco-friendly adhesives and finishes available. Arrosto European Oak of Navona collection features smooth texture and rustic naturally treated wood. Dry-sawn 3.5 mm thick top layer. Arrosto European Oak Navona Collection by Monarch Plank hardwood flooring is made with a formaldehyde-free adhesive (EPI), contains no added formaldehyde of any kind CARB ATCM Phase II Compliant. Arrosto European Oak comes with a lifetime structural warranty, a 25-yr residential finish warranty and a 3-yr light commercial finish warranty.