Let me tell you, this little silicone cap has saved my Insta360 X4's lenses more times than I can count. It's like a tiny armored shield that snaps on with satisfying precision - that *click* sound when it seats properly is pure dopamine.

I use mine daily when throwing the camera into my backpack between shots. The thickness (about 2.5mm) makes it feel substantial, like it could actually survive a drop. Pro tip: The ventilation holes align perfectly with the X4's design - no overheating issues during storage.

Yes, it collects dust like a magnet (you'll want to wipe lenses before shooting), but that tight fit means zero accidental pops-off. Works flawlessly with both premium and standard lens guards too - slides right over them like they're not even there.

After trying third-party caps that either stretched out or didn't seal properly, this OEM version is worth every cent of its $6 price tag. My only gripe? Why doesn't Insta360 include this essential protector with their $500+ camera?

If you value your X4's delicate twin lenses at all, consider this non-negotiable insurance. Just be prepared to wrestle slightly when removing it from tight pockets - that's the tradeoff for bombproof protection.