ScopeGuard Alaska Neoprene Scope Covers Painstakingly Made Only By US Army Veterans In the USA! Instant Field Release, Yet Keeper Loop Retains It On the Rifle Out Of Line Of Sight. Keeps Lenses Clean, Clear and Dry To The Instant of Shot Opportunity. For Best Fit, The Scope Length Should Fall Near The Middle Of The Fit Range. Solves the problems inherent in clumsy, breakable flip-up style covers.