Pool covers are used for several primary reasons: to protect the pool from harsh winter weather, to help keep out accumulations of wind-blown dirt, leaves and debris, to keep water from re-entering the pool and for safety reasons. Cover are made from a variety of materials including mesh fabric, vinyl and laminated materials. Some types of covers are designed primarily to seal off the pool for the winter, without necessarily considering the safety factor. Other cover stress the safety factor. Inground and Above ground cover are different in design and usage. Stock or custom covers are available to suit most needs. Proper winterizing protects your investment and can help make springtime opening easier and less expensive