If you need a great half mask respirator bag, this is the one. Got my first one from a guy I work with when I first started. It inevitably reached the end of its life, but the company I work for couldn't/wouldn't get more of these bags, just offered us some crap ones instead, so I ordered a few of these to have on hand. Besides my half mask, I usually store a flashlight, channel locks, gloves, & lockout tags inside. On the D-rings on the outside I keep a lockout lock or two hooked on them. Pair this with a wide belt or large carabiner , and you're set.