ULTCOVER Waterproof Square Hot Tub Spa Cover 85" — Black 600D Polyester, Elastic Hem & Venting

ULTCOVER's Waterproof Square Hot Tub SPA Cover (85") is a durable, breathable weather shield designed to protect square hot tubs from rain, snow, leaves and debris while allowing ventilation.

Designed to fit square hot tubs up to 85 inches by 85 inches, this black ULTCOVER protective outer cover is constructed from heavy-duty 600D polyester with a waterproof backing. It functions as an outer layer that repels moisture and dirt, reduces cleaning time, and helps preserve the appearance of your insulated hard cover beneath. Please note: this outer cover is intended to be used over an insulated hard cover and is not a substitute for one.

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

The ULTCOVER is made from a 600D polyester canvas with a waterproof backing that blocks water, snow, and most debris. Its full-coverage design keeps sunlight and contaminants off the underlying cover, helping prevent fading and surface damage.

• Waterproof backing resists rain and snow penetration.
• Tough polyester face sheds leaves, dirt, and bird droppings.
• Full coverage stops UV exposure to the insulated cover beneath.

Will it stay on during wind and bad weather?

The cover includes heavy-duty elastic cords that cinch under the spa frame for a snug fit, reducing lift during gusts. Two structured side air vents promote airflow while minimizing wind catch, so the cover remains stable and reduces strain on attachment points.

• Elastic cords for an adjustable, secure fit in high winds.
• Dual air vents prevent the cover from ballooning or tearing.
• Full-edge fit reduces gaps where wind can get under the cover.

Is this cover easy to put on, remove, and maintain?

The lightweight 600D polyester construction makes handling straightforward for one or two people, and the elasticized hem speeds placement and removal. Cleaning is simple — hose off surface dirt and allow to air dry — helping you keep the cover looking new without special cleaners.

• Elastic hem simplifies fitting and removal.
• Wipe or hose clean; quick air-dry fabric.
• Durable stitching and vents reduce maintenance needs over time.

What size and compatibility should I verify before buying?

This ULTCOVER model is intended for square hot tubs with maximum dimensions of 85" (length) x 85" (width). Confirm the outer measured dimensions of your spa or its insulated hard cover to ensure a correct fit; the cover is designed to fit over an existing hard/insulated spa lid.

• Fits square hot tubs up to 85" x 85".
• Measured to cover the full perimeter; check your spa’s outer edge measurements.
• Not a standalone insulated cover—use over a hard/insulated lid.

Who this is for: The ULTCOVER Waterproof Square Hot Tub SPA Cover 85" in black is ideal for hot tub owners who already use an insulated or hard spa cover and want an extra outer layer to extend that cover’s life. It suits homeowners in climates with frequent rain, snow, pollen, or wind who need a breathable, easy-to-use protective shield that reduces cleaning and protects against UV and debris. If you need an insulated primary lid, purchase a certified hard cover separately; this product is built as an outer protective shell to preserve and protect that primary cover.