Best Waterproof Polyester Square Hot Tub Cover Outdoor Spa Covers Square Hot Tub Cover Z [Highest Quality] The hot tub cover is made of 210D Oxford cloth and silver-plated waterproof fabric to ensure durability and long-term use. [Function] It can protect the outdoor hot tub from the sun, rain, snow, and fallen leaves, and keep the bathtub clean and tidy. [Widely used] In winter, it can prevent snow and frost; in summer, it can prevent dust and sunscreen; in autumn, it can also prevent falling leaves, multi-functional function, universal in all seasons. [Practical and durable] It is tear-resistant, weatherproof and breathable, easy to clean, and has a long service life. [Space saving] This high-quality weather cover is small in size, foldable, easy to install and disassemble, and does not take up space.