This thing is tough.
It's tough enough to use as a replacement car door hinge.
It's so tough, if you put two of these on each end of a nuclear bomb and then set it off, smoke MIGHT come out from between the two caps. Maybe. If it was a big nuke.
All kidding aside, I have used the majority of scope covers out there, and this style (flexible rubber) is by far the toughest made. If you have ever had the wind pick up and knock your rifle over on the caps only to leave you wondering where the broken bits of scope cover went, these covers are for you.
Pros: Grenades less.
Cons: Robs of you of the constant need to replace your scope caps.
This review was written in the old system and had content requirements that are different than reviews written today.