I’m so upset I bought this, and expected better. I ordered the HD660 headphones since the reviews indicated they are clearer without the "Sennheiser veil". Amazon phone associate was right on it to send a replacement. In fact its really helped my back feel better. Sturdy for my adult mountain bike and my 5 year old heavy mountain bike. I have very thick, course hair that holds onto product and is rarely greasy. It is a powerful little vacuum. Las zapatillas geniales y sin ningun problema. Heaven help me if I try to use them to get to the basement! My foot is rather narrow and I ordered 8M, but with the adjustable strap they fit well and are very comfortable.