1. Waterproof 420D Material with Density – This telescope cover is crafted from durable 420D Oxford fabric, featuring a waterproof PU coating that ensures weather resistance, water repellency, UV protection, and tear resistance. No matter the weather, it shields your telescope from sunlight, rain, snow, wind, and dust. 2. Thermally Stable – Silver Coating on the Outside – The exterior silver coating provides heat insulation, preventing the telescope from overheating. Even in extreme heat or cold, the material maintains its protective performance. 3. Enhanced Stability – Available in sizes 100 x 75 cm (39 x 30 inches) and 150 x 85 cm (59 x 33 inches), the telescope cover includes an elastic cord to secure it firmly to your telescope, ensuring maximum stability even in windy conditions. No more concerns about the cover slipping or shifting. 4. Compatibility with Larger Sizes – Our telescope cover is designed 35 cm larger than most waterproof covers on the market (a tight fit may cause tearing), making it more adaptable to various telescope types. Please verify your telescope's dimensions before .