The Orion Scope Cloak Telescope Cover is an affordable and easy to use telescope cover that protects your equipment from dust, dirt, dew, and sunlight. Large aperture Dobsonian reflector telescopes of 12 to 16 aperture can easily be kept clean and tidy with this Scope Cloak. Keep your telescope set β up and ready for viewing in your garage, shed, or home observatory without worrying about dust and dirt contamination. Orions Scope Cloak is made of a high tech tear-free β resistant and water-resistant material that keeps your optics free of dew. The highly reflective exterior surface rejects solar radiation, keeping your telescope cool when left in sunlight and reduces cool β Down Time (The amount of time required for your telescope to reach thermal equilibrium after nightfall). The scope cloak telescope cover prevents dust form contaminating telescope optical surfaces, reducing the need to perform delicate and tedious cleaning procedures. A handy locking drawstring provides a snug fit once installed on your telescope. The Orion Scope Cloak Telescope Cover for 12 16 Dobsonian reflector telescopes is designed for temporary outdoor use and is NOT intended to be used for permanent unsheltered outdoor storage. A handy nylon carrying pouch is included.