My wife and I have the resque tags items on our jackets and sticker on our helmets. Nice item, but have been difficult to get in the past. Usually comes with two, fold up, red colored, packets that you write you medications, allergies, ICE info on. The two "packets" are for your jacket and your riding suit pants. My wife uses one of hers on her purse at all times.
There's also a sticker you apply to your helmet for first responders to see.
I just wish the item was more readily available. Any means of ID is great, although I tend to agree with others; do first responders "generally" look for such info or tags? I would hope so.