This Mspa Heat Preservation Bubble Mat is designed to protect your hot tub from rough surfaces and ground debris. It effectively preserves heat in your spa, preventing the bottom from getting cold, especially during winter. The mat features an anti-slippery design and is suitable for all Mspa square models and most other square hot tubs. Dimensions: H:186 x W:186 x D:4 cm. Weight: 1.0 kg. Colour: Grey. Model Number: MSPA-6p. The mat is energy-saving, helping to retain the spa's heat. It is made with anti-slip and waterproof materials.