Introducing the ultimate flexible dew shield that lays flat or rolls up for easy storage.Our flexible dew shields are made of lightweight durable black ABS plastic.The interior is felt-lined to help absorb moisture and to prevent extraneous light from reaching the optics.Sewn Velcro strips facilitate quick wrap-around placement onto the corrector plate rim. A two-inch rubber trim also wraps around the OTA to prevent any slippage. A simple, cost effective way to fight off dewAvailable in a wide range of sizes. Simply wraps around end of optical tube. Rolls up for easy storage. Sewn Velcro strips hold them firmly in place.