They are not lightweight. We are going to keep them but wanted to let potential buyers know that a velcro strap may not be included on the shoe (in case you are purchasing them for that reason). Although slightly snug at first with socks, a few nights of use later and it stretched and conformed to fit real well. I have gone through a few different styles. Overall super happy, just wish they were a little bit stronger to hold our wet towels, but those were pretty heavy! Bought this for my mom as an upgrade from an old Neo S5 Samsung, and she loves it. Not the quality I expect from Nike. If they simply moved the charging port to the top of the speaker beside the buttons, then ONE short side of the speaker would be FLAT, and they would be totally flexible for vertical or horizontal use! Other: - Big sturdy case - this could be problematic if you travel with a small bag. I will not recommend to others to buy it.