Bestway 58106-XGLX16XX02 Flowclear Swimming Cover for Rectangular Steel Pro Pools, Blue, 9 ft 10 Inch (3.00 m x 2.01 m) Price: £12.28 (as of 10:22 EST- More info)

Insulate your pool and keep it free from unwanted debris
Reduce water evaporation to prevent unnecessary water waste
Built in drain holes prevent water accumulation