Spa Fitter
Garden Leisure Spas GLP863B Replacement Cover
The Garden Leisure Spas GLP863B takes the AIRCAP 1™ Large — a foam-free replacement hot tub cover for square spas 89"–91". The GLP863B's cabinet measures 91" x 91", 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 | 91" x 91" |
|---|---|
| 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 GLP863B
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 GLP863B's 91" x 91" shell with the right overhang. Instead of a rigid foam core wrapped in vinyl, the AIRCAP 1™ uses welded drop-stitch construction (the material of premium inflatable paddleboards): a sealed air chamber that cannot absorb water, so it never becomes the waterlogged, two-person lift that ends most foam covers.
Cabinet dimensions can change between model years. Before ordering, measure your GLP863B side to side across the top of the cabinet in both directions — the SureFit™ guide walks through it in two measurements. If your spa measures between two sizes, round up.
Every spa in our catalogue that measures 91" x 91" is on one page: hot tubs that take a 91" × 91" cover — the same AIRCAP 1™ Large, at the same price.
Other Garden Leisure Spas models we fit
Not a GLP863B?
The Spa Fitter matches 496 models across 40 brands to the right AIRCAP 1™ — or measure any square spa with SureFit™.