I bought 2 of these for St. Patrick's Day. My intentions were to layer them under our welcome mats. Unfortunately, when you unroll them, they don't flatten out. We tried weighing them down. They keep curling up, so several people tripped, and almost every person who walked on them had to stop and try to flatten it out. This is not a good product. I thought of even saving them for a beach trip or something, but they would probably blow away or continue to roll up. Waste of money. I want a refund...