Loop-Loc Safety Covers are built super tough to protect your facility. It’s the only cover that has passed the “Bubbles the Elephant” Test! Loop-Loc’s mesh safety cover is designed for a perfect fit for any shape pool or spa. Loop-Loc Covers not only meet, but exceed ASTM F1346-91 standards for Safety Swimming Pool Covers. Loop-Loc Cover have even undergone extensive outside testing through Underwriters Laboratories (UL) and have earned the U.L. seal of approval for safety swimming pool covers. They’re even backed by a 12-year warranty!