Our HPI Enviro-Mesh pool cover keeps all the dirt, silt and debris out of your pool while allowing water to pass through. The silver coating on the topside of the Enviro-Mesh cover makes it a customer favorite for two reasons:helps prevent the mesh from losing its strength over timespeeds up melting of snowIncludes 3ft of overlap (cover will measure 3ft larger than pool size) making this cover easier to secure.Pool size - 30' DiameterCover Size - 33'Features:Mesh Cover Black/SilverDense Weave3' OverlapWater Bag Loop Every Four FeetSpeeds Up MeltingPrevents StretchingSturdy ratchet and cable system