North Sanctum
A hot tub in a finished basement in winter, its cover parked upright beside it, a blue bubble blanket on the water and a small sensor on the wall
Hot Tubs NOVWANG

NOVWANG 86 Inch Round Hot Tub Mat Absorbent Non-Slip Spa Pool Accessories

A felt mat with a waterproof backing that sits under the tub and catches the drips around it.

Best for inflatable tubs on a bare concrete floorthe wet strip where you step outround tubs up to 85 in across

Bare concrete and wet feet are a poor match, and a basement floor in winter is slow to dry. This mat is a round sheet of gray felt, 86 in (218 cm) across and 3 mm thick, with a PE backing. Per the listing, the felt takes up splashes and drips, and the backing keeps them off the floor and grips it.

It is thin, and the listing claims no insulation, so do not expect it to warm a cold slab. Its job is the floor: less standing water, less friction under the tub and a surface that is not slick where you step out. In a room that is already damp, give the exposed felt a chance to dry between soaks.

Tip: Set the tub off-center on the mat, so the widest strip of felt is on the side where you climb out.

Photos & price on AmazonAffiliate link

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