ULTCOVER Waterproof Square Hot Tub Spa Cover 72" — 600D Polyester Outer Weather Shield with Vents

ULTCOVER's Waterproof Square Hot Tub SPA Cover (72") is a robust, breathable outer cover designed to shield square hot tubs up to 72 inches from rain, snow, debris and UV exposure when used over an insulated hard cover.

This outer-layer protective cover is built from tough 600D polyester with a waterproof backing and vents to preserve air flow. It is not a primary insulating lid—install it on top of your existing insulated hard cover to add weather resistance, reduce surface wear, and keep dirt and moisture off. The design emphasizes lasting fabric strength, secure fit, and ventilation to reduce uplift in windy conditions.

How does this ULTCOVER protect my hot tub from weather and debris?

The 600D polyester canvas with waterproof backing repels rain, sleet and bird droppings while blocking dust and leaves. Seams and fabric resist repeated exposure so the outer surface stays cleaner and your underlying insulated cover experiences less wear.

• Waterproof backing prevents surface moisture penetration.
• Durable 600D polyester resists tears and abrasion.
• Full-coverage cut shields sides and top from UV and soiling.

Will it stay in place during wind or storms?

Yes—built-in heavy-duty elastic cords secure the cover around the tub’s perimeter so it hugs the shape and resists gusts. In addition, structured vents on two sides reduce sail effect by equalizing pressure, lowering the chance the cover will be lifted or torn away.

• Elastic adjustment cords tighten the fit for windy conditions.
• Two side air vents provide ventilation and reduce uplift.
• Reinforced edges help the cover maintain its shape under stress.

Is this cover a replacement for my hot tub’s insulated lid?

No—this product is an outer protective layer intended to be used over an insulated hard cover. It adds weatherproofing and surface protection but does not replace the thermal insulation or locking mechanisms of a primary cover.

• Designed for use in combination with an insulated hard cover only.
• Adds exterior weather resistance and keeps the insulated lid clean.
• Not rated or structured as the main insulating barrier.

How do I choose the right size and maintain the cover?

Measure the longest and widest points of your hot tub; this ULTCOVER fits square tubs up to 72" x 72". For care, remove loose debris, rinse with mild soap and water, and let air dry before storing to prolong fabric life.

• Fits square tubs up to 72 inches by 72 inches.
• Spot clean with mild detergent; avoid harsh chemicals.
• Store dry in a shaded area when not in use for extended periods.

Who is this for: This ULTCOVER outer cover is ideal for spa and hot tub owners who already use an insulated hard cover and want extra protection from the elements. It suits homeowners in rainy, snowy or windy climates who want to limit surface staining, reduce maintenance, and extend the aesthetic life of their primary cover. If you need additional insulation or locking capability, pair this product with a compatible insulated cover; if you only want thermal protection, choose an insulated lid instead.