{WINTER POOL COVERS} This Hydrotools by Swimline pool cover is designed to protect traditional above ground swimming pools during the winter season. Hydrotools covers prevent snow ice and debris from entering the pool, increasing pool longevity. {PERFECT SIZE} This pool cover is best suited for 24 FT Round shaped pools. The actual cover measures 27 FT leaving plenty of overlapping material to ensure a good fit while leaving room for accessories such as Hydrotools air pillows. {SILVER KING MATERIAL} Hydrotools By Swimline Silver King line of winter covers feature a solid 12 x 12 scrim thread count material, ensuring no water or debris passes through during the winter season. The covers are also UV & Chemical resistant. {EASY TO INSTALL} Featuring perimeter attachment grommets and a super lightweight, yet durable design, this winterizing pool cover is incredibly easy to install - it comes with steel cable and a winch, ready for installation right out the box {SIZING GUIDE} Your Swimline cover should be able to naturally float loosely on the water. If you have large top rails, consider going up a size. Tighten the cover so it feels secure around your pool without feeling overstressed. {HYDROTOOLS PRO TIP} Swimline covers pair perfectly with our wide range of ice equalizer air pillows, water tubes, and wall bags. Utilize the integrated perimeter grommets when using wall bags for ultimate support. {SWIMLINE PROMISE} Swimline offers a wide selection of cover options across all sizes and strengths. Designed in our USA headquarters in New York, we stand by our products and offer a 1-year warranty against manufacturing defects.