This hot tub mat is an absolute must-have if you have an inflatable hot tub or ice bath! At 90x90 inches, it's massive enough to fit under most round or square tubs up to 89 inches in diameter. The top layer is made of quality felt that absorbs water splashes beautifully - no more mopping the floor after each use. The waterproof PE backing prevents any moisture from reaching your floor, which is crucial for protecting wood decks or indoor flooring from water damage. The non-slip feature is fantastic too - the mat stays firmly in place even when the floor gets wet, so you don't have to worry about slipping accidents. At 3mm thick, it provides just enough cushioning to protect your tub from rough surfaces without being bulky. When you're not using it, it folds up compactly for easy storage. I've used mine under my inflatable hot tub on my wooden deck for several months now, and it's prevented any water damage or discoloration to the wood. It's also surprisingly versatile - I've used it under my barbecue grill and even for outdoor yoga when I need a dry surface. If you want to protect your investment and your flooring while making hot tub maintenance easier, this mat is worth every penny.