The ear pieces on this particular model do a good job of sealing, thus minimizing environmental noise without the added feature of active noise cancellation. I also like that you can actually walk in them--not always a given with ladies shoes. Ein absolut toller Schuh! *edit*- I was using the rubber cover on the wrong end! Basically I have one side that faintly works. Update: vendor contacted me and offered a completely satisfactory solution, so Im boosting my rating. This rack did not come with assembly tool. Model reviewed: I bought the Pro-30 Upgraded Standard version in silver and brown. I think they may stretch some,but you need to buy as close to your size as possible. Update: Monday aug 12th used with my j hooks to transport my paddle board.