I bought 4 of these to put on the roof rack of my camper for a big road trip. Purchased this thinking that generic competitors had likely caught up with AfterShokz since that purchase. Did have to get a size bigger though. The Ohana pair took a few weeks to completely form to my feet and feel perfectly comfortable. I just love it. Sky and Hedwig LOVE this product! My partner and I use this to watch TV when the little one is asleep. We put four bikes on with no problem - one mens, one womans, and two childrens - one 18 inch with training wheels and one 20 inch. One shoe chart on internet says 9. (this depends on the style i think) I have had problems with my ankle tendon and now need a more supportive shoe for walking and these fit the bill exactly, providing great support both under my foot and also holding my foot firmly to ensure that I dont twist my ankle over on uneven ground which i am prone to do.