Yep. I've found these to be the best design available, by far. It's pretty hard to NOT get a good seal with these. They can also be used from any angle relative to the patient, from the either side, from above the head, or even astride the patient's torso. This matters because patients often are found in the darnedest places, like wedged firmly between the bathtub and the toilet. They do go a bit flat after a couple of years, but a syringe-full or two of air injected through the sealed air filling port takes care of that.

The much more common design of pocket mask actually requires some good hands-on training before the user is able to reliably achieve a decent seal on most patients, and works best from the head.

Jeff