In practice, I dont even perceive a dampening of ambient noise from the foam cups much less any form of Active sound cancellation. Ordered these in 7W and Im surprised at how well they fit! Requested the customer care to look into this, they promised to send another replacement once it is in stock with them, which is not possible for atleast next 30 days. With this, I dont have to worry about electronics and small appliances being plugged while not in use. There is no real arch support inside so if you get plantar fasciitis, make sure you have an insert that works well for you. I am so sad that Microsoft could not make these work great at least with their very own MS Teams, and I had to return for the second time. We absolutely love this spice rack. I think it looks very trendy and quite beautiful. I’m typically a 9. Plenty of toe room.