Our Dual Sided ACA Synergy Pro Cornhole Bags are made with 2 different materials and filled with Plastic Resin. Dual Sided Bags give the player the option of a throw that either slides or sticks firm when it hits the playing surface. The "Slow Side" is microsuede and the "Fast Side" is poly turbo weave fabric. The suede grabs onto the playing surface stopping the bag once it hits the playing surface. Great for precision shots or the last point win shot. The poly turbo weave allows the bag to slide on the playing surface - great for scoring throws or knocking off opponents bags.