The Alaskascopeguard is similar to the 'old' Butler Creek neoprene covers but with an important addition to retain the cover to the rifle when you take it off. I don't thing I would 'slingshot' it off the scope per the instructions but the retention is a great idea. The plus is the cost and the added protection to your scope. I have 'lost' the slip on Butler Creek (and other brands) when brush busting and in extreme cold conditions. And yeah they still 'leak' in heavy downpours. The inner tube works but try finding a tube in todays world and getting a good fit. Note: if you already have a neoprene full scope cover you can add a retention feature if it does not have one. Think, velcro and very small diameter bungee cord! Also, since the old neoprene covers are considered 'not cool' and out of date they can sometimes be found in the dollar box at gunshows and your LGS.