Snow, Ice, Leaves, Dirt & Debris, and the Sun... all have damaging effects on your expensive hard top spa cover. Protect your investment whenever your spa is closed with Loop-Locs Spa Cover Protector Cap. LOOP-LOCs Spa Cover Protector Cap is manufactured using the same high quality polypropylene materials as in our safety pool covers. Elasticized for a snug fit, 12 inch apron, and polypro loops sewn to cover; lets you securely weave your closure straps through to keep the cover firmly in place. Neatly packed in storage tote for convenience.