Sturdy product. - Leupold Alumina Flipback Lens Cover

Probably will last as long as you own the scope vs. the plastic slip-over flip-ups which are okay but eventually fail. That is what you need to consider given the rather high price of the Alumina covers. When these covers snap closed they stay in place which has not always been my experience with the much cheaper slip-overs. I have waited for a discounted offering as the MSRP is way too expensive.