[SZonian]

Actually, there’s a rubber bladder inside the leather shell...the “stretch” factor should be practically non-existent.

I watched “How it’s made”, that’s how I know...

[mmichaels1970]

I watched “How it’s made”, that’s how I know...

Nice!!!

[Travis McGee]

I understand about the flexible rubber bladder. But the leather sleeve is not made of iron or carbon fiber, but organic leather that does indeed change its elasticity when soaking wet.