UIRWAY 9x18 FT Rectangular Pool Cover with Reflective Strips, Swimming Pool Cover for Above Ground Pool, Solar Cover Including Rope Tie and Luminous Ground Nails for Rectangular or Oval Pools

https://www.amazon.com/dp/B0DRF4J68J?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4&th=1 Best $28 you will spend on the pool. I've had it for a year and it spent the winter frozen, on and off, covered in snow and came through unscathed. The corners wrap around like wrapping a present and it has stayed put in some strong wind storms. At the end where the straps are, I feed the strap either side of the legs and it helps to keep it down. Along the length there is a string half way. I tied an empty chlorine jug to it, filled with water. With consistent high winds you may want to double up on the jugs and also place some along the short ends. The material is good quality.