Winter pool covers differ from pool covers used during the warm months of the year in their design and construction. To start, winter tarps are thicker than the regular pool covers and are often made from thick vinyl. Many winter pool covers above ground and over winter above ground pool covers also have several characteristics that improve their sustainability so that they can withstand cold temperatures, wind conditions and other elements. For example, winter pool covers many manufactured with materials specially designed to prevent snagging. Extra-wide material is also commonly used for winter swimming pool covers to reduce the number of stitches. Weather resistant coatings are also typical of winter pool covers, including coatings that resist damage by UV radiation from the sun.