Spa Fitter
Integrity Spas Molokai Replacement Cover
The Integrity Spas Molokai takes the AIRCAP 1™ Large — a foam-free replacement hot tub cover for square spas 89"–91". The Molokai's cabinet measures 90" x 90", inside the Large's range. The cover weighs 35–40 lb for life, costs $1,195, is engineered to comply with ASTM F1346-23, and carries a 3-year limited warranty.
| Spa cabinet | 90" x 90" |
|---|---|
| AIRCAP 1™ size | Large fits 89"–91" |
| Cover weight | 35–40 lb — constant for life |
| Price | $1,195, free US shipping |
| Skirt | Ziptech™ modular, three lengths included |
| Safety | Engineered to comply with ASTM F1346-23 |
| Warranty | 3-year limited warranty |
Why the Large fits the Molokai
The AIRCAP 1™ comes in six sizes covering square spas from 77" to 94". Each size is built to overhang its band slightly — that is how a spa cover is meant to sit — so the Large, which fits cabinets 89"–91", covers the Molokai's 90" x 90" shell with the right overhang.
At 90" the Molokai sits mid-band in the Large's 89"–91" range, 1" off the bottom and 1" off the top. Within Integrity Spas, the Molokai shares that 90" x 90" cabinet with Hawaii, Montego Bay, Oahu and Rum Cay — same footprint, same cover. Integrity Spas builds the 10 models we fit on 4 footprints, and the Molokai is on number 3 of 4 from the smallest; the line spans 3 of the six AIRCAP 1 sizes.
Cabinet dimensions can change between model years. Before ordering, measure your Molokai at its widest point across the top, in both directions, including any acrylic lip that overhangs the cabinet — the SureFit™ guide walks through it in two measurements. If a figure you have found elsewhere is larger than ours, an overhanging lip is the usual reason. If your spa measures between two sizes, round up.
Every spa in our catalogue that measures 90" x 90" is on one page: hot tubs that take a 90" × 90" cover — the same AIRCAP 1™ Large, at the same price.
How the AIRCAP 1™ is built
Instead of a rigid foam core wrapped in vinyl, the AIRCAP 1™ uses welded drop-stitch construction: a sealed air chamber with no foam to absorb water, so it does not become the waterlogged two-person lift that ends most foam covers. More on how it insulates, how it holds up, and why it is foam-free — or estimate what your current foam cover weighs.
Every Integrity Spas model we fit
| Model | Cabinet | AIRCAP 1™ |
|---|---|---|
| Bimini | 79" x 79" | XX-Small |
| Antigua | 86" x 86" | Medium |
| Fiji | 86" x 86" | Medium |
| Hawaii | 90" x 90" | Large same cover as the Molokai |
| Maui | 91" x 91" | Large |
| Molokai (this page) | 90" x 90" | Large |
| Montego Bay | 90" x 90" | Large same cover as the Molokai |
| Oahu | 90" x 90" | Large same cover as the Molokai |
| Rum Cay | 90" x 90" | Large same cover as the Molokai |
| Tahitian | 90" x 90" | Large same cover as the Molokai |
Integrity Spas Molokai cover: common questions
What size hot tub cover fits the Integrity Spas Molokai?
The Integrity Spas Molokai takes the AIRCAP 1 Large, which fits square hot tubs measuring 89"–91" across. The Molokai's cabinet measures 90" x 90", inside that band. Measure your spa side to side across the top of the cabinet to confirm before ordering.
Will the AIRCAP 1 fit an Integrity Spas Molokai?
Yes — the Molokai's 90" x 90" square cabinet falls in the AIRCAP 1 Large's 89"–91" range, and the Ziptech modular skirt system ships with three skirt lengths so the drop over the cabinet adjusts without a custom order. Cabinet sizes can change between model years, so confirm with two quick measurements.
How much does a replacement cover for the Integrity Spas Molokai cost?
The AIRCAP 1 costs $1,195 in every size, including the pump, three Ziptech skirt lengths, and tie-down straps, with free US shipping and 30-day returns. Unlike a foam cover it has no foam core to waterlog, so it stays at its original 35–40 lb weight for life.
How heavy is a replacement cover for the Integrity Spas Molokai?
The AIRCAP 1 Large weighs 35–40 lb and keeps that weight permanently — its sealed drop-stitch air core cannot absorb water. A foam cover starts at 40–75 lb and gains weight as the foam saturates.
Not a Molokai?
The Spa Fitter matches the current models of every major brand to the right AIRCAP 1™ — or measure any square spa with SureFit™.