I use this helmet for caving. Our club has about a dozen of these for prospective members to borrow and every member owns their own. I have had this helmet recommended by a few other long-time cavers as well.
Pretty good helmet, simple but useful.
Climbed with it several times outside
I used this helmet on a recent Rope Rescue Course. I was extremely pleased with the ease in ehich it adjusted to my head whether I wore a watch cap, beanie or nothing.