Flexible to cut to fit Can be cut to match the size of your pool or bathtub, providing a good fit for most swimming pools. Large size offers ample coverage. Durable and fade resistant Made from grade PE material that is waterproof and dustproof. Safe, firm, reusable, and not easy to break or fade. Wide range of applications Suitable for use in gardens, large swimming pools, inflatable pools, sports venues, private pools, hot spring pools, and underground or aboveground pools. Keeps water warm Insulating thermal bubbles provide effective heating for the pool all summer, helping the water stay warm through cool nights and cloudy days. Use scenarios Inground or aboveground backyard pools: cut to size for a proper fit and use throughout the swimming season. Portable or inflatable pools at events or sports venues: deploy to cover and protect when the pool is not in use. Private hot springs or underground pools: use to maintain warmth and extend usable days.