The inflatable insulation bladder provides better heat preservation and rain outflow. Place the cover onto the spa pool as pictured.

Please note that the warning on the bladder should read, stop inflating before the wrinkles disappear. The hot water of the spa pool together with sunlight will cause the air in the bladder to expand. When you take the bladder off the spa pool, if your hand doesn't easily push into the bladder, it is over-inflated. Let some air out.

Fits our round 6 person verto series spas (Mono, Naval Tidal and Cocoon.

Inflated, size of bladder is: 162cm

Also, under product number B0303972

Please note: Does not include the spa, Inflatable Insulation Bladder is the inner white part