A closed-cell foam pad that sits between a hot tub and the ground. It adds a layer of insulation under the base, which slows heat loss through the floor and keeps the water warmer between soaks. The non-porous surface wipes clean and resists moisture and mildew, and the foam cushions the shell against dirt, debris and sharp objects underneath. It is a low-cost add-on for anyone with a portable or inflatable tub on a patio, deck or concrete slab; it does not replace a cover or a heater, and the heat savings are modest compared with fixing a loose lid.
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Rated 4.7 out of 5 from 113 ratings. Owners mainly report easier cleaning and a bit more warmth underfoot, with the fit and trimming being the usual talking point.
This insulating foam mat goes between a hot tub and the ground. It is made of high-density insulating foam that helps retain heat and reduce energy loss, so the water stays warm longer. It also protects the bottom of the tub from dirt, debris and sharp objects, and helps reduce wear on the liner.
The surface is smooth and non-porous, so it wipes clean after use. The mat resists moisture and mildew. It is flexible and lightweight, and it can be cut or trimmed to fit your hot tub. It also adds a cushioned layer under the tub.
The pieces have jigsaw-style edges that interlock for compact assembly. The mat comes in multiple sizes.