American Excelsior Company developed the concept of a folded center erosion control blanket (ECB) over 20 years ago. Every single and double net Curlex® Excelsior, AEC Premier Straw®and AEC Premier Coconut™ ECB manufactured by American Excelsior Company comes standard with a folded center. The fold not only aids in faster and easier unrolling, it eliminates the chances of a hard center, which can be difficult to unwind.