The Orion Flexishield Dew Cap reduces the formation of dew, prolonging your observing sessions. It's made of durable, flexible ABS plastic that won't chip or break like hard dew caps. It wraps snugly around your telescope tube and fastens with Velcro. FlexiShield can be stored flat or rolled up for convenient storage and transport. It also makes an excellent lens shade when using your telescope in daylight.