I wear a very similar style. I love 'em. I used to put the cord around the back of my neck..but it's very long, so I shorted it by knotting it a couple times...but then I just ended up taking the string out.I took a look at these and the seem to have a lot going on outside the ear. Do you find that they interfere with put on or taking off your helmet?
the benefit of these plastic plugs is that they aren't sponges...rinse em under hot water and they're clean as a whistle in seconds. When they are clean and dry, and if your ear canal is super clean and dry, it does become difficult to push them. Putting a lil water on them helps...
They don't interfere with putting on or taking off the helmet. and for me, honestly, I can't ride without them. I realize immediately if I've forgotten to put them on as soon as I start the bike.