The Scopecoat Scope Cover - Large 12.5"x42mm Black by Scopecoat is a high?quality neoprene/nylon laminate protective sleeve designed to fit scopes with standard or low turrets, offering a slim, field?ready solution for safeguarding optics from dust, dirt, dings, scratches and moisture. Measuring 12.5 inches in length with a 42mm objective, this cover accepts a custom fit by stretching approximately 1 to 1.5 inches beyond the stated size, making it suitable for a range of sighting setups when you measure your scopes overall length in inches and the objective lens in millimeters. While not completely waterproof, the Scopecoat is extremely water?resistant and breathable, actively drawing moisture away from the optic; for temporary extra protection, a spray?on water repellent can be applied to the exterior, followed by a thorough air?dry before reuse. When soiled, machine washing in warm water with a mild detergent is recommended, avoiding bleach and fabric softener, and the fabric should be air dried after turning inside out. This cover provides reliable protection in the field, preserving lens clarity and extending the life of your scope.