Vancouver Air jet Inflatable Hot Tub Liner.

Great quality, stays inflated and retains the heat so much more than just the normal cover alone

Heavier than the original. Being used. Very happy.

Excellent value for money.
Fit our hot tub and keeps the heat in

This really does keep the heater from coming on as much. It was a noticeable reduction on the electricity bill.
…However…
My hot tub water was beautifully clear before I started using it but after a couple of days the water went really cloudy with a chalky texture on the surface. I’m assuming this is from a powdery residue during manufacturing. I’ve removed it and rinsed it down and I’m hoping it’s a one off!

Edit: it is a one off. The water has remained crystal clear since cleaning the inflatable lid and yes (as other reviews have suggested) the lid can deflate but it all comes down to temperature. The air inside it expands with warmth so when it’s fitted on hot days with warm water it’s very full. When you turn the heater off or the air outside is cool or you leave it off the hot tub then you will notice it looking deflated. It’s not an issue - it’s science

Very happy with my purchase, blown it up over 10 days ago and hasn't lost any air at all. Fits my 4 person lazy spa perfectly. Compared to my original lazy spa lid, this is much better quality and better value for money. Recommend completely!