To get mine on, I put both arms in first and kind of pull it out as much as I can whilst I put my head in. It ALWAYS gets stuck around the top of my chest but it's not cripplingly painful, so I just spend a couple of minutes wiggling around and tugging it down bit by bit at the front and back. Once I've got the back pulled down properly it all sort of falls into place. Doesn't make it much easier, but it's the only way that works for me! Some guys have more success pulling it up over their hips, but I wasn't able to do that, so I guess it varies person to person, depending on things like your body type. Either way it takes a lot of practice, but I've heard it gets easier the more you wear it!