Flexible Dew Prevention Shields! Introducing the ultimate flexible dew shield that lays flat or rolls up for easy storage. 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. The best advantage of the Flexible Dew Shield is that it lays flat or rolls up for easy storage.