Quote Originally Posted by Echo2 View Post
How "water proof/resistant" would you guys say these are?

They aren't what I would call waterproof. I would wrap them in some OD duct tape and then maybe carry them in a ziplock bag as well.

As Riverrat pointed out, they are constructed in a cardboard tube. While they are sturdy, and will no doubt handle my fat ass falling on top of them, I would definitely protect them form the elements. But hey, for a fraction of the cost of an ALS can, these are a good buy.