Everyone has Birkenstocks and I wanted something a little different, and I love Sorel shoes, so I gave these a try. 5 or 10 in most shoes and based on reviews I went with a 9. Perfect fit, very soft and super comfortable! I love the soft material and it does not stick to my skin or make me sweaty. Sound Quality - Rich, spacious and immersive, maybe skewed slightly more toward treble than bass but not to the point where I feel I need to EQ the output from my phone. This pump is perfect. When it comes to headphones, I prefer something simple that works. They do NOT loosen or droop during normal wear. This Redmi Note 9 Pro is excellent. Not this.