Size Round swimming pool protective cover is suitable for a swimming pool with a diameter of 10ft/ 305 . You can adjust the size you want as needed; 1.1 kg, solar film with double stainless aluminum eyelets at a distance of 1 m, including tension cord, drain valve and tension ratchet. MaterialOuter cover is made of waterproof PVC and film 0.18mm thick vinyl, stable, tear-proof, durable and weather-resistant fabric tarpaulin. solar panel with numerous air cushions on the lower part noticeably accelerates the heating of the water (resistant to UV and temperatures from - 40C to + 70C), and prevents rapid cooling and evaporation in a sustainable way .no need for frequent water changes. Extended pool life. Easy to UseEasy to use round pool cover pool cover; heavy-duty rope tie, closes tightly to the edge of the pool. Drainage holes prevent water accumulation; Accessory pool cover is soft, easy to put on and foldable. The pool cover can reach the size of A3 paper, easy to carry and store without occupying too much storage space. Wide range of uses Blue pool cover Ideal for covering and protecting wood ,cars,motorcycles,boots,swimming pools,etc.it can against moisture,dirt,dust,pollen and bad weather.for like gardens,camping,balconies,suitable for round pools.