Like many I am sick to the back teeth of butler creek scope caps breaking and generally not being fit for purpose. I am not a fan of the bikini style caps that come with most scopes as I find them clumsy. I have tried attaching them to the scope so I don't leave them up the high seat or on range floor at the shot site. But even then the flappy rubber bands catch on foliage. I bought a set of tenebrex scope covers for a Schmidt PM11 not much change from £80. Good quality but of kit but limited by the fixings on what scopes they fit. I needed some for a Zeiss V8, I know zeiss produce aluminium objective covers but didn't want to attach a lever onto the end of my scope that would transfer stress if it was caught up on anything or hit when open.
I came across the Defender caps from Vortex a few weeks ago. They looked good and less than half the price of the tenebrex I thought they were worth a go. I ordered a set from here Vortex Defender Flip Caps
When they showed up the very next day, I was very impressed by the quality construction. The hinges were equal to the tenebrex. They stay shut and open easily unlike the butler creek. I like the fact that they fold flat when open so not to extend your silhouette, especially when shooting off sticks.
The best bit is they have a life time guarantee. I don't think I will need to use it but it's reassuring to know. I have at least 3 snapped butler creek caps floating about and hate to think how much money I wasted on them. The hinges are build to last as you can see compared to the butler creek.