Constructed of high quality 3mm thick neoprene/nylon laminate, the Standard Scopecoat is designed to fit scopes with standard or low turrets, safeguarding your optics from dust, dirt, dings, scratches and moisture. This slim fit cover is perfect for the field. It is extremely water resistant and draws moisture and condensation away from your scope. You may make it temporarily waterproof with commercial spray-on water repellent, and it is machine washable. Note: The "perfect fit" is a matter of personal preference, ranging between a relaxed fit to a more form-fitted one. Cover can stretch 1-1.5" beyond stated length. This model is black, Medium (5). It is compatible with 30mm objective diameter and is 10.5" long.Give your high-end optic the protection it deserves with the original Scopecoat by Sentry, the industry leader in protection of weapons and gear. Safeguard your optics from dust, dirt, dings, scratches and moisture. Made from Neoprene a material commonly used in wet suits, conforms to the shape upon which it is placed so it takes up minimal space in your safe or case. Our Neoprene/Nylon laminate composition assists in repelling moisture and condensation away from your optic, as well as, dirt and debris. This combination helps to protect your optics from the elements and damage while storing or transporting your gear.