Genuine OEM-fit replacement covers built to your exact Master Spas factory specification — correct dimensions, radius, skirt and fold, every time. Shop by your series or size below, add a cover lifter, or build a fully custom cover.

Every Master Spas hot tub cover is made to order to your model's original factory dimensions, corner radius and skirt length — a genuine OEM fit, not a "close enough" universal cover. Pick your series below, or shop all hot tub covers.
Getaway Hot Tubs Covers
San Miguel, Ocho Rios and Bar Harbor covers.
Shop Getaway Hot Tubs covers →
Older or discontinued model — Contractor Series, Legacy Whirlpool, Freedom or Tahiti? We still build those. Build a custom cover or send us your serial number and we'll spec it for you.
Know your measurements? Open a list below and jump straight to the right size. Measure the top of the cabinet edge-to-edge in both directions — if you're between sizes or need a shape that isn't listed, build it custom.
The Axis Cover System rolls open instead of lifting — each cover is matched to a specific swim spa model.
OEM-fit covers for Master Spas swim spas, fully customizable to your climate. Larger spans mean insulation, taper and a good lifter matter even more — see all swim spa covers.
H2X Swim Spas Covers
Trainer, Challenger and Therapool swim spa covers.
Shop H2X Swim Spas covers →
Michael Phelps Swim Spas Covers
Momentum, Force and Signature swim spa covers.
Shop Michael Phelps Swim Spas covers →
Skip the lifting entirely. The Axis Cover System is a rolling, end-to-end swim spa cover — just roll it up and get in. Built to fit H2X Fitness and Michael Phelps Signature swim spas.
Explore the Axis Cover System →
A cover lifter makes opening your spa a one-person, few-second job — and by keeping the cover off the ground it protects the vinyl and vapor barrier, so your cover lasts longer.

Popular picks: Cover Valet Caddy · Master Integrated 360 Lift
Keep your existing cover in service, or add an upgrade to the one you're ordering.
Upgrades like the Poly-Shield outer skin, 8-mil vapor barrier, full-length steam stopper and commercial-grade handles are selected while you build your cover — start a custom cover or ask us to add them to an order.
Spa cover spec sheets are full of numbers that don't mean much until someone explains them. Here's what each option actually does — and when it's worth paying for. Every one of these is chosen when you build a custom cover.
The foam core is what actually holds heat in. 1.5 lb density is the energy-efficient standard for most climates. 2.0 lb is commercial grade — denser, stiffer, and noticeably better at holding temperature and resisting sag under snow.
The core is thicker in the middle and thinner at the edges so rain, snow and melt run off instead of pooling in the center. The bigger the taper, the higher the R-value and the better it sheds weather — a 6"→4" core is the cold-climate choice.
A sealed plastic skin wrapped around the foam. This is the part that decides whether your cover stays light or turns into a waterlogged slab — moisture in the foam is the #1 reason covers get too heavy to lift. The 8-mil upgrade is the single best defence against it.
The outer shell that takes all the sun, rain and snow. Marine-grade vinyl is UV-stabilised so it resists fading, cracking and mildew far longer than standard upholstery vinyl.
An alternative to vinyl: lighter, highly weather-resistant and built to shrug off intense sun and moisture. A good pick for harsh exposure or if you want a cover that is easier to handle day to day.
A foam seal that closes the gap along the fold. The hinge is the biggest heat-leak on any cover — a full-length steam stopper runs the entire seam and keeps hot, humid air from escaping right down the middle.
The fold is the hardest-working part of the cover and the first place a cheap cover fails. Reinforcement adds material and stitching where the daily bending happens.
Standard comfort handles are fine for lighter covers. Commercial-grade rubber handles are worth it on bigger covers, on swim spas, or anywhere the cover gets lifted by hand every day.
Reinforced straps with keyed locks hold the cover down against wind and — more importantly — form a safety barrier that keeps children and pets out of the water.
The flap that hangs down over the cabinet. It seals the gap between cover and shell so wind cannot get underneath and strip heat away. Master Spas covers use a 5" skirt as standard.
The curve of each corner. Master Spas cabinets use a 6" corner radius. Getting this right is the difference between a cover that seats flush and one that leaves a heat-leaking gap at every corner.
Which way the cover folds when you open it. Set this so the hinge lands where you actually want it — away from your steps, your lifter, or the view.
The short version: if you live somewhere cold or snowy, prioritise the 2.0 lb foam, the 6"→4" taper and the 8-mil vapor barrier — those three do most of the work. Everything else is comfort and longevity. Ask us and we'll spec it for your climate.
Choose from the standard assortment in two outer materials. Marine-grade vinyl is the classic UV-treated skin in the widest colour range; WeatherShield™ is a lighter, highly weather-resistant alternative. Colour is selected when you build your cover.
Screens render colour differently and vinyl has texture and sheen that a flat swatch can't show — treat these as a guide, not an exact match. Deciding between two shades? Give us a call or message us and we'll talk you through them — 1-888-946-8882.
Want us to do it for you? Give us your model and serial number and we'll pull the exact factory spec. Contact us or call 1-888-946-8882. Not sure which model you have? Our Master Spas model & serial number guide shows you where to find it.
Odd shape, discontinued model, non-standard size, or a spa that isn't a Master Spa? We build made-to-order covers to any specification — round, triangle, oversized, cut corners and everything between. Choose your foam density, taper, vapor barrier, vinyl color, skirt, fold and upgrades, and we'll build it to fit.

Give us your model and serial number and we'll match the exact factory-spec cover — built to order and shipped to your door. Genuine OEM fit from the Master Spas cover experts.