1.[High-quality materials]: This telescope cover is made of waterproof Oxford silver coated polyester fabric, available in silver and black, and will not crack in cold or hot weather. It is UV-proof in summer and snow-proof in winter. 2.[All-weather protection]: No matter how bad the weather is, the telescope cover can fully protect it. You can ly put it in the underground garage or courtyard. It will protect your telescope from sunlight, rain, UV rays, snow, dust, moisture, etc., and extend the life of the telescope. 3.[Size]Large: 15085CM/5933.4in, Small: 10075cm/39.429.5in Please measure your telescope to choose the appropriate cover size. 4.[Windproof]There is an adjustable drawstring at the bottom, which can be adjusted to the most suitable tightness according to the size of the telescope. It can stay firm even if there is wind and will not be blown away.