HotTubWorks Spa Cover Features
Safe: Meets All ASTM Safety Standards

Spa cover safety is especially important if you have small children or pets around. For your peace of mind, all our covers meet or exceed the rigorous safety standards of the ASTM. Please note: Many municipal building codes require ASTM-compliant covers (extra safety tip: buying our ASTM-compliant spa cover is probably much safer than bribing your building code inspector).
Rugged Marine Grade Vinyl Top

All our cover tops feature premium 30 oz. Marine Grade vinyl treated with mildew and UV inhibitors to help keep your cover strong and looking new. And for all you polar bears out there, our covers are cold crack tested down to -20° F.
Tapered Virgin Foam Insulation

Our 4" to 2" tapered spa cover features closed cell virgin foam core insulation in a variety of densities to meet your needs. You can be assured that no matter which model you order, our insulation taper offers the best combination of strength and heat retention while keeping cover weight to a minimum. And, if you need a super strong, high R-Value cover, you can't beat our 6"-4" Ultra cover (R-Value: 24).
6 mil Double-Ply Poly-Laminate Underneath
It may not be obvious but spa covers are more vulnerable from the inside than from the outside. Our Industrial Grade, super-strong, heat sealed vinyl "scrim" with durable polyester reinforcement keeps chemical fumes and moisture from invading your cover.
Best Warranty
You can rest easier knowing that your spa cover warranty provides protection that is second-to-none. It is five years, non-prorated, "bumper-to-bumper" and it includes full protection for the biggest single cause of cover failure: moisture in the insulation core. We're so sure of our advanced sealing technology, our warranty covers the insulation AND the $100 shipping cost in the unlikely event you should need the insulation replaced. We invite you to compare this with any other warranty out there (beware of warranties with seemingly long terms, limited core protection and/or no provision for replacement shipping).
Exclusive Moisture Lock Heat Seal

The number one cause of cover failure is moisture absorption in the core. Have you ever had a cover that was so heavy, it practically broke your back when you tried to lift it? There is a reason we can offer the best warranty in the industry against moisture damage. We use an exclusive, state-of-the-art core insulation vacuum heat sealing process to protect your cover insulation against moisture invasion.
Send in the Reinforcements!

You'll be glad to know our new spa cover is reinforced "six-ways-from-Sunday" at 37 different stress points including the hinge, handles, straps, corners and skirts. Additionally, we use #93 UV resistant Dacron Polyester thread and double stitching throughout (except the hinges which are quadruple-stitched). There simply isn't a stronger spa cover available at any price.
Sturdy, Four Layer Hinge

We use four layers of reinforced vinyl for this critical stress point. Our hinge has been tested for thousands of folds, so in addition to dealing with the stress of all those openings and closings, your new spa cover is a strong and worthy candidate for that new cover lift you've been lusting for (well maybe not lusting exactly, but be sure to check out our exclusive cover lift bundle deals at check-out for the best cover + cover lift combo prices on the Internet... Guaranteed!).
Super-Strength Recessed Handles

Why settle for wimpy looking black web mesh handles when you can have recessed, reinforced vinyl handles that match your cover exactly?
Premiere Skirt Seals Heat in, Dirt Out

Our dual-layer reinforced skirt is custom cut to help seal in your spa's heat and protect your acrylic from UV. Our double-sewn split skirt corners are cut and stitched to provide a better fit and less skirt "fold-under" than cheaper continuous skirts.
Locking, Extra-Strong Tie-Down Straps

If you have kids, pets or uninvited guests, you can be assured that our beefy, triple-reinforced straps will secure your new cover to your spa and you'll have added security with our locking fasteners. Fasteners come with both male and female parts and hardware (which isn't nearly as sexy as it sounds but it's really handy).
Grommeted Drain Holes

This added touch aids in the release of moisture that can get trapped inside the cover and provides extra insurance against core saturation. Our grommets will not corrode or scratch your spa.
20 Gauge Steel Reinforced Center Channel

For extra strong support, a 20 gauge non-corrosive steel bar is inserted into both pieces of foam insulation to strengthen the center of your cover.
Commercial Grade Zipper and Flap

The hidden, commercial grade zipper is corrosion resistant and allows easy but protected access to the sealed core.