"Custom fitted for maximum protection". Butler Creek's "instant action" scope covers have been the number one choice of serious shooters and hunters worldwide. The flip-open has an inner O-ring that provides an airtight seal to keep out dust and moisture. Re-designed hinge provides silent action and flawless performance in all weather conditions. Ergonomic button design has a non-slip surface for one-touch action. Manufactures Website Address www.butler-creek.com Warranty Information Limited lifetime warranty.